You or a loved one may have been exposed to asbestos at a past job. Use this alphabetical listing of known asbestos exposure sites in Ohio to find any companies you may have worked for.
| Name | City |
|---|
| C. G. Cooper And Company | Mt Vernon |
| C. G. Cooper Company | Mt Vernon |
| C. G. Cooper Company | Mt Vernon |
| C. Schmidt Sons, Incorporated | Cleveland |
| C. W. Booher, Inc. | Dayton |
| C.a. Litzler | Cleveland |
| C.e. Sears And Company | Circleville |
| C.e.i. | Ashtabula |
| C.e.i. | Willoughby |
| C.e.i. Ashtabula c Station, Biannual | Ashtabula |
| C.h. Heinricks Greenhouse | Columbia Station |
| C.l. Gaugler Machine Company | Kent |
| C.o. Henriksen | Columbiana |
| C.p. Hall Chemical | Akron |
| C.w. Raymond Company | Dayton |
| Ca Litzler Company Inc. | Cleveland |
| Cabot Corp | Ashtabula |
| Cabot Corp | Ashtabula |
| Cabot Corporation | Ashtabula |
| Cabot Corporation | Cleveland |
| Cabot Titania Corp | Ashtabula |
| Cabot Titania Corp Old Tickle Plant | Ashtabula |
| Cabot Titania Corporation | Ashtabula |
| Cabot Titania Corporation | Ashtabula |
| Cabot Titania Corporation | Ashtabula |
| Cabot Titania, Inc. | Ashtabula |
| Cahot Titania | Ashtabula |
| Cahot Titania Corp | Ashtabula |
| Cal-hio Chemical Plant | Cleveland |
| Calhio Chemicals, Inc. | Perry |
| Calhoun Residence Hall Plbg | Evendale |
| Cambria | Lorain |
| Cambria Clay Products Company | Oak Hill |
| Cambridge Brewing Company | Cambridge |
| Cambridge Developmental Center | Claysville |
| Cambridge Glass Company | Cambridge |
| Cambridge State Hospital | Cambridge |
| Cambridge State Hospital | Cambridge |
| Cambridge State Hospital | Canton |
| Camp And Thompson | Cuyahoga Falls |
| Campbell Soup Co | Napoleon |
| Campbell Soup Co V-8 Plant | Napoleon |
| Campbell Soup Co. | East Maumee |
| Campbell Soup Co. | Napoleon |
| Campbell Soup Company | Napoleon |
| Campbell Soup Company | Napoleon |
| Campbell Soup Company | Napoleon |
| Canaan Coal Company | Canaanville |
| Canadian Copper Company | Cleveland |
| Cannan Coal Company | Canaanville |
| Canton And Akron Railway Company | New Berlin |
| Canton Bearing Plant | Canton |
| Canton Bearing Plant | Colesville |
| Canton Casting | Canton |
| Canton Casting | Canton |
| Canton Die | Canton |
| Canton Drop Forge | Colesville |
| Canton Drop Forge Plant | Canton |
| Canton Drop Forge Plant No 1 | Canton |
| Canton Drop Forging Mfg. Co. | Canton |
| Canton Drop Forging Mfg. Co. | Massillon |
| Canton Drop Forging And Manufacturing Company | Canton |
| Canton Electric Company | Canton |
| Canton Electric Light And Power Company | Canton |
| Canton Forge And Axle Company | Canton |
| Canton Forge And Axle Company | Canton |
| Canton Forge Plant | Canton |
| Canton Harrison S. M. | Louisville |
| Canton Hughes Pump Company | Canton |
| Canton Laundry And Cleaning Company | Canton |
| Canton Light, Heat And Power Company | Canton |
| Canton Malleable Iron Co | Canton |
| Canton Malleable Iron Company | Canton |
| Canton Malleable Iron Company | Canton |
| Canton Saw Company | Canton |
| Canton Screen Plant,truscon Division | Canton |
| Canton Sewage | Canton |
| Canton South High School | Canton |
| Canton Steel Foundry Company | Canton |
| Canton Steel Foundry Company | Canton |
| Canton Steel Foundry Company | Canton |
| Canton Storage Inc | Canton |
| Canton Water Pollution Control Center | Canton |
| Capital City Products Company | Columbus |
| Capitol Savings And Trust Company, S.a. Essmein | Columbus |
| Carbo Tool And Die | Fremont |
| Carbon Black | Belpre |
| Cardinal Operating Co. Cardinal Power Plant | Brilliant |
| Cardinal Operating Co. Cardinal Power Plant | Brilliant |
| Cardinal Operating Co. Cardinal Power Plant Units 1 2 | Brilliant |
| Cardinal Operating Company | Brilliant |
| Cardinal Operating Company | Brilliant |
| Cardinal Operating Company | Brilliant |
| Cardinal Operating Company | Brilliant |
| Cardinal Operating Company | Brilliant |
| Cardinal Operating Company | Brilliant |
| Cardinal Power Station | Brilliant |
| Cardinal Power Station #3 | Brilliant |
| Cardinal Powerhouse | Brilliant |
| Cardington Baptist Temple | Cardington |
| Carew Building | Cincinnati |
| Carew Tower Building | Cincinnati |
| Carey Philip Co Div Panac | Lockland |
| Carey Philip Co. | Lockland |
| Cargill, Incorporated | Dayton |
| Cargill, Incorporated, Terry Dean | Dayton |
| Carl Meyer Corp | Rocky River |
| Carlisle Chemical Works | Reading |
| Carlisle Chemical Works | Reading |
| Carlson Fabricating Welding | Lorain |
| Carlyle Tile | Cole Grove |
| Carnahan Tin Plate And Sheet Company | Canton |
| Carnahan Tin Plate Works | Canton |
| Carnation Company | Coshocton |
| Carnation Company | Hillsboro |
| Carnegie Illinois Steel Corporation | Canton |
| Carnegie Illinois Steel Corporation | Youngstown |
| Carnegie Steel Company | Mcdonald |
| Carnegie Steel Company | Cleveland |
| Carnegie Steel Company | Mingo Junction |
| Carnegie Steel Company | Columbus |
| Carnegie Steel Company | Fairport Harbor |
| Carnegie Steel Company | Mingo Junction |
| Carnegie Steel Company | Bellaire |
| Carnegie Steel Company | Mingo Junction |
| Carnegie Steel Company | Youngstown |
| Carnegie-illinois Steel Corp. | Youngstown |
| Carnegie-illinois Steel Corp. | Pittsburgh |
| Carnegie-illinois Steel Corp. (u.s. Steel) Ohio Works | Youngstown |
| Carney Paper Company | Maumee |
| Carrier Corporation | Akron |
| Carroll Foundry And Machine Works | Bucyrus |
| Carrousel Shopping Center Reading Road | Cincinnati |
| Carter Jones Lumber Co | Akron |
| Carter Jones Lumber Co | Stow |
| Carthage Mills, Incorporated | Cincinnati |
| Case Crane And Kilbourne Jacobs Company | Columbus |
| Case Institute Library And Humaniti | Cleveland |
| Case Institute Of Technology | Cleveland |
| Case Institute Of Technology Olin Building | Cleveland |
| Case Institute Of Techonlogy | Cleveland |
| Case School Of Applied Science | Cleveland |
| Case Western Reserve | Cleveland |
| Case Western Reserve Univ. Case Institute Of Technology | Cleveland |
| Case Western Reserve University Mens Dorm Mistletoe Magnolia | Cleveland |
| Cash Sale | Cleveland |
| Cashway Lumber Co | Akron |
| Cashway Lumber Co | Austinburg |
| Cashway Lumber Co | Columbus Grove |
| Cashway Lumber Co | Dover |
| Cashway Lumber Co | Kent |
| Cashway Lumber Co | Lewisville |
| Cashway Lumber Co | Lisbon |
| Cashway Lumber Co | Mogadore |
| Cashway Lumber Co | Ontario |
| Cashway Lumber Co | Sandusky |
| Castalia Cement Company | Castalia |
| Castalia Portland Cement Company | Castalia |
| Castalloy | Brookpark |
| Castle Homes | Akron |
| Castle Lumber Company | Canton |
| Castruction Co | Boardman/youngs |
| Catalytic Inc Pvc Recovery Plant | Piqua |
| Caxton Building Company | Cleveland |
| Caxton Building Company | Cleveland |
| Cdr Oscar | Cleveland |
| Ce Glass Company | Lancaster |
| Cecil Peck | Cleveland |
| Cedar Apartments | Cleveland |
| Cedar Ave. Power House | Cleveland |
| Cedar Locust Housing For Elderly | Canton |
| Cedar Road Apartments | Cleveland |
| Cedar School Boiler Room | Canton |
| Ceder Apartments | Cleveland |
| Cei | Cleveland |
| Cei Powerhouse | Cleveland |
| Celina Stearic Acid Company | Celina |
| Celotex Corp. | Lockland |
| Celotex Corporation | Lockland |
| Celotex Corporation | Cleveland |
| Celotex Corporation | Fort Clinton |
| Centerior Energy Corporation | Ashtabula |
| Centra Sales Co. | Cleveland |
| Central Alloy Steel Corporation | Canton |
| Central Alloy Steel Corporation | Canton |
| Central Aluminum | Columbus |
| Central Ave. Shops | Toledo |
| Central Branch | Dayton |
| Central Branch National Home For D.v.s. | Dayton |
| Central Brass | Cleveland |
| Central Catholic High School Boiler Room | Canton |
| Central Concrete Supply | Lima |
| Central Foundries Division Gmc | Defiance |
| Central Foundry | Defiance |
| Central Foundry Div Inc | Defiance |
| Central Foundry Division | Defiance |
| Central Foundry Division | Defiance |
| Central Furnace Company | Cleveland |
| Central Furnace Company | Massillon |
| Central Heating Company | Toledo |
| Central Market Street Railway Company | Columbus |
| Central National Bank | Cleveland |
| Central Ohio Light Power | Bluffton |
| Central Ohio Light Power Co. Woodcock Station | Bluffton |
| Central Silica Company | Glassrock |
| Central Silica Company | Zanesville |
| Central Steel Company | Massillon |
| Central Supply Plumbing | Woodlawn |
| Central Thomson Houston Company | Cincinnati |
| Central Thomson Houston Company | Cincinnati |
| Central Trust Cafeteria 310 Race Street | Cincinnati |
| Central Union Depot And Railway Company | Cincinnati |
| Central Union Telephone Building | Columbus |
| Centria | Claysville |
| Centria, Incorporated | Cambridge |
| Centrifugal Castings | Ravenna |
| Century Die | Fremont |
| Century Industries | New Waterford |
| Century Industries | New Waterford |
| Century Industries | New Waterford |
| Cerro Copper Brass Company | Cleveland |
| Certified | Maple Heights |
| Certified Alloys | Cleveland |
| Certified Alloys | Maple Heights |
| Cesco Plant | Crooksville |
| Chafer And Becher | Cleveland |
| Champaign Machine And Forging Company | Cleveland |
| Champion Bar And Knife Company | Springfield |
| Champion Coated Paper Company | Hamilton |
| Champion International Corporation | Hamilton |
| Champion International Corporation | Hamilton |
| Champion International Paper Mill | Hamilton |
| Champion Machine Forging | Cleveland |
| Champion Machine And Forging Company | Cleveland |
| Champion Paper | Hamilton |
| Champion Paper | Chillicothe |
| Champion Paper Fiber Co. Pipe Shop | Hamilton |
| Champion Paper Co. | Hamilton |
| Champion Paper Company | Hamilton |
| Champion Paper Company 502 Heaton Street | Hamilton |
| Champion Paper Company Building 153 | Hamilton |
| Champion Papers, Incorporated | Hamilton |
| Champion Spark Plug Company | Toledo |
| Champion Spark Plug Company | Toledo |
| Champion Spark Plug Company | Toledo |
| Champion Spark Plug Company | Toledo |
| Champion Steel Co. | Orwell |
| Champion Works | Springfield |
| Champlain | Cleveland |
| Champlain Street Plant | Toledo |
| Chandler Price Company | Cleveland |
| Charles Boldt Company | Cincinnati |
| Charles F. Ketterling Memorial | Dayton |
| Charles G. Hartje / Hartje Brothers Paper Company | Toronto |
| Charles Hoffman Company | Mansfield |
| Charles Murphy, General Contractor | Coal Grove |
| Charles Pfizer Company, Incorporated | Gibsonburg |
| Charles Sucher Packing Company | Dayton |
| Charles Sucher Packing Company | Dayton |
| Charles Taylor Sons | Cincinnati |
| Chase Brass Copper | Euclid |
| Chase Brass Copper | Cleveland |
| Chase Brass Copper Co Inc | Cleveland |
| Chase Brass Copper Co. | Cleveland |
| Chase Brass Copper Company | Cleveland |
| Chase Brass Copper Company | Euclid |
| Chase Brass Copper Company | Cleveland |
| Chatfield Manufacturing Company | Carthage |
| Chattanooga Glass Co | Mount Vernon |
| Cheasapeake Ohio Railroad | Hamilton |
| Chemical Materials | Cleveland |
| Chemical Products Company | Reading |
| Chemical Products Plant | Cleveland |
| Chemical Products Works | Cleveland |
| Chemical Rubber Company | Cleveland |
| Chemidyne Corporation | Macedonia |
| Cheney Pulp Paper Co | Franklin |
| Cherry Valley Iron Works | Leetonia |
| Chesapeake And Ohio Railroad Company | Summit |
| Chesapeake And Ohio Railroad Company | Toledo |
| Chestnut St. Power Plant | St Mary's |
| Chevrolet | Toledo |
| Chevrolet | Cleveland |
| Chevrolet Division Of General Motors Co. | Norwood |
| Chevrolet Motor Div Gmc | Toledo |
| Chevrolet Motor Division | Parma |
| Chevrolet Motor Plant | Brookpark |
| Chevrolet Motor Plant | Brookpark |
| Chevrolet Motor Plant | Brookpark |
| Chevrolet Plant | Toledo |
| Chevrolet Transmission Plnt | Toledo |
| Chevrolet, Division Of General Motors Corporation | Norwood |
| Chevrolet, Division Of General Motors Corporation | Lordstown |
| Chevron #61 #62 #63 Po Box 38014 | Cincinnati |
| Chevron Asphalt Co | North Bend |
| Chevron Asphalt Co. | Cleves |
| Chevron Asphalt Company | Cincinnati |
| Chevron Asphalt Company | Cincinnati |
| Chevron Asphalt Company | North Bend |
| Chevron Asphalt Company | Columbus Park |
| Chevron Asphalt Company | Belpre |
| Chevy | Cleveland |
| Chicago And Toledo Railway Company | Toledo |
| Chicago Bridge Iron Co | Lima |
| Chicago, Indiana And Southern Railroad Company | Cleveland |
| Childers Products | Cleveland |
| Children`s Home | Cincinnati |
| Children`s Hospital | Cincinnati |
| Children`s Mental Hospital | Hamilton |
| Childrens Hospital Heating Plant | Cincinnati |
| Chilliclothe Mills Rec Area 1 | Chillicothe |
| Chillicothe Boiler #7 | Chillicothe |
| Chillicothe High School | Chillicothe |
| Chillicothe Mills Rec Area #1 | Chillicothe |
| Chillicothe Paper | Chillicothe |
| Chillicothe Paper | Chillicothe |
| Chillicothe Paper Company | Chillicothe |
| Chillicothe Paper Company | Chillicothe |
| Chillicothe Paper Company | Chillicothe, Ross County |
| Chillicothe Tire And Rubber Company | Chillicothe |
| Chittenden Hotel | Columbus |
| Christ Hospital | Cincinnati |
| Christ Hospital | Evendale |
| Christian Moerlein Brewing Company | Cincinnati |
| Chrome Alloy | Bucyrus |
| Chrysler | Bowling Green |
| Chrysler | Dayton |
| Chrysler | Fostoria |
| Chrysler | Perrysburg |
| Chrysler | Twinsburg |
| Chrysler | Dayton |
| Chrysler Corp | Perrysburg |
| Chrysler Corp Airtemp Division | Dayton |
| Chrysler Corp Toledo Machining Plant | Perrysburg |
| Chrysler Corp. | Dayton |
| Chrysler Corporation | Toledo |
| Chrysler Corporation | Twinsburg |
| Chrysler Corporation | Twinsburg |
| Chrysler Corporation, Jeep Division | Toledo |
| Chrysler Corporation, Jeep Division | Toledo |
| Chrysler Corporation, Jeep Division | Toledo |
| Chrysler Corporation, Jeep Division | Toledo |
| Church Of Christ Scientist | Cleveland |
| Cincinati Chemical Works | Norwood |
| Cincinatti Workhouse | Lamping |
| Cincinnati Abbatoir Company | Cincinnati |
| Cincinnati Abbatoir Company | Cincinnati |
| Cincinnati And Columbus Traction Company | Cincinnati |
| Cincinnati And Newport Railway Company | Cincinnati |
| Cincinnati Brewing Company | Hamilton |
| Cincinnati Bulk Mail | Sharonville |
| Cincinnati Car Company | Cincinnati |
| Cincinnati Chemical Company | Cincinnati |
| Cincinnati Chemical Works | St. Bernard |
| Cincinnati Chemical Works | Norwood |
| Cincinnati Childrens Hospital Medical Center | Cincinnati |
| Cincinnati Club | Cincinnati |
| Cincinnati Coffin Company | Cincinnati |
| Cincinnati Corrigating Company | Cincinnati |
| Cincinnati Country Club Grandin Road | Cincinnati |
| Cincinnati Electronics | Cincinnati |
| Cincinnati Gas Electric | Columbus Park |
| Cincinnati Gas Electric Dicks Creek Power Station Compressor Building | Monroe |
| Cincinnati Gas Electric Co General Electric Miami Fort Station | North Bend |
| Cincinnati Gas Electric Co General Electric Miami Fort Station | North Bend |
| Cincinnati Gas Electric Co General Electric Miami Fort Station | North Bend |
| Cincinnati Gas Electric Co Miami Fort | Columbia Park |
| Cincinnati Gas Electric Co Walter Beckjord | New Richmond |
| Cincinnati Gas Electric Co Walter C. Beckjord Generating Station | New Richmond |
| Cincinnati Gas Electric Co Walter C. Beckjord Generating Station | New Richmond |
| Cincinnati Gas Electric Co Walter C. Beckjord Generating Station | New Richmond |
| Cincinnati Gas Electric Co.- Beckjord Generating Station | New Richmond |
| Cincinnati Gas Electric Company | Columbia Park |
| Cincinnati Gas Electric Headquarters | Cincinnati |
| Cincinnati Gas Electric Headquarters 14th Floor | Cincinnati |
| Cincinnati Gas And Electric Co. Power Plant | Cincinnati |
| Cincinnati Gas And Electric Company | Moscow |
| Cincinnati Gas And Electric Company | Columbia Park |
| Cincinnati Gas And Electric Company | Moscow |
| Cincinnati Gas And Electric Company | North Bend |
| Cincinnati Gas And Electric Company | New Richmond |
| Cincinnati Gas And Electric Company | Cincinnati |
| Cincinnati Gas And Electric Company, Dayton Power And Light Company | Cincinnati |
| Cincinnati Gas And Electric Company, Dayton Power And Light Company | Miami Fort |
| Cincinnati Gas And Electric Company, Dayton Power And Light Company | Wrightsville |
| Cincinnati Gas And Electric Company, Dayton Power And Light Company | Wrightsville |
| Cincinnati Gas Light And Coke Company | Cincinnati |
| Cincinnati Gasket | Cincinnati |
| Cincinnati General Hospital | Cincinnati |
| Cincinnati General Hospital | Cincinnati |
| Cincinnati General Hospital | Cincinnati |
| Cincinnati General Hospital 234 Goodman Avenue | Cincinnati |
| Cincinnati Gymnasuim | Cincinnati |
| Cincinnati Ice Machine Company | Cincinnati |
| Cincinnati Ice Manufacturing And Cold Storage Company | Cincinnati |
| Cincinnati Inc | Cincinnati |
| Cincinnati Industries Inc | Cincinnati |
| Cincinnati Machine | Cincinnati |
| Cincinnati Machine, A Unova Company | Cincinnati |
| Cincinnati Masonic Temple Company | Cincinnati |
| Cincinnati Milacron | Wilmington |
| Cincinnati Milacron | Cincinnati |
| Cincinnati Milacron Fly Ash Collector | Cincinnati |
| Cincinnati Millicron | Cincinnati |
| Cincinnati Milling | Cincinnati |
| Cincinnati Milling Co. | Cincinnati |
| Cincinnati Milling Machine Co | Cincinnati |
| Cincinnati Milling Machine Company | Wilmington |
| Cincinnati Milling Machine Company | South Lebanon |
| Cincinnati Milling Machine Company | Cincinnati |
| Cincinnati Milling Machine Company | Cincinnati |
| Cincinnati Milling Machine Company | Wilmington |
| Cincinnati Municipal Airport | Cincinnati |
| Cincinnati Music Hall Association | Cincinnati |
| Cincinnati Northern Traction Company | Hamilton |
| Cincinnati Post Office | Cincinnati |
| Cincinnati Refinery | Cleves |
| Cincinnati Refinery Gulf Tank #61 | Cleves |
| Cincinnati Refinery Gulf Tank #62 | Cleves |
| Cincinnati Refinery Gulf Tank #63 Bond 62 | Cleves |
| Cincinnati Refinery Gulf Tanks #9 #202 | Cleves |
| Cincinnati Rubber Manufacturing Company | Cincinnati |
| Cincinnati Rubber Manufacturing Company | Norwood |
| Cincinnati Rubber Manufacturing Company | Norwood |
| Cincinnati Rubber Manufacturing Company | Cincinnati |
| Cincinnati Savings Curtain Wall | Cincinnati |
| Cincinnati Soap Company | Dayton |
| Cincinnati Specialties | Cincinnati |
| Cincinnati Street Railway Company | Cincinnati |
| Cincinnati Suede | Cincinnati |
| Cincinnati Terminal Warehouse Company | Cincinnati |
| Cincinnati Traction Company | Cincinnati |
| Cincinnati Traction Company, Pendleton Station | Cincinnati |
| Cincinnati Union Terminal | Cincinnati |
| Cincinnati Union Terminal Company | Cincinnati |
| Cincinnati Water Works Kellogg Avenue | Cincinnati |
| Cincinnati Work House | Cincinnati |
| Cincinnati, Georgetown And Portsmouth Railroad | Olive Branch |
| Cincinnati, Milford And Loveland Traction Company | Milford |
| Cincinnati, Newport And Covington Railway | Cincinnati |
| Cinergy Generating Station | Miami Fort |
| Circleville High School | Circleville |
| Circleville Light And Power Company | Circleville |
| Citco | Chardon |
| Citizens Electric Street Railway, Light And Power Company | Mansfield |
| Citizens Light And Heating Company | Toledo |
| Citizens Light And Heating Company | Toledo |
| City And Suburban Telegraph Association | Cincinnati |
| City Asbestos Company | Cleveland |
| City Auto Stamping Toledo Terminal Rr | Toledo |
| City Auto Stamping Co., Inc. | Toledo |
| City Hall | Athens |
| City Hall | Cincinnati |
| City Heat And Light Company | Fostoria |
| City Hospital | Cleveland |
| City Hospital Of Akron | Akron |
| City Ice Delivery Company | Cumminsville |
| City Light And Power Company | East Palestine |
| City Of Bellefontaine, Ohio Water Works Department | Bellefontaine |
| City Of Cleveland | Cleveland |
| City Of Cleveland | Cleveland |
| City Of Cleveland Lake Road Generating Station | Cleveland |
| City Of Cleveland Municipal Light Plant | Cleveland |
| City Of Cleveland Municipal Light Plant | Cleveland |
| City Of Cleveland Southerly Wastewater Treatment Plant | Cuyahoga Heights |
| City Of Cleveland Southerly Wastewater Treatment Plant Blower Building | Cuyahoga Heights |
| City Of Cleveland Boys Farm | Hudson |
| City Of Cleveland Division Ave. Pumping Station | Cleveland |
| City Of Cleveland Fairmount Pumping Station | Cleveland |
| City Of Cleveland Water Works, Kirkland Street Pumping Station | Cleveland |
| City Of Columbus Gas Turbine Station | Columbus |
| City Of Columbus, Municipal Electric Plant | Columbus |
| City Of Dayton Water Works Pumping Station | Dayton |
| City Of Dover Municipal Light Plant | Dover |
| City Of Euclid Sewage Disposal Plant | Euclid |
| City Of Hamilton Dept Of Public Utilities Third Street Power Plant | Hamilton |
| City Of Hamilton Dept Of Public Utilities Third Street Power Plant | Hamilton |
| City Of Hamilton Municipal Electric Plant | Hamilton |
| City Of Napoleon Municipal Water Electric | Napoleon |
| City Of Newark Ohio | Newark |
| City Of Norwalk Municipal Light Plant | Norwalk |
| City Of Oberlin Municipal Light And Power Plant | Oberlin |
| City Of Orrville Municipal Power Plant | Orrville |
| City Of Painesville Light Plant | Painesville |
| City Of Painesville Power | Painesville |
| City Of Piqua | Piqua |
| City Of Shelby Municipal Light Plant | Shelby |
| City Of St Marys | St Mary's |
| City Of St. Marys Municipal Power Plant | St Mary's |
| City Of Toledo Bay View Treatment Plant | Toledo |
| City Of Toledo Water Works | Toledo |
| City Of Troy Power Plant | Troy |
| City Of Troy Electric Plant | Troy |
| City Of Troy Power Plant | Troy |
| City Of Wooster Waterworks Booster Station | Wooster |
| City Railway Company | Dayton |
| City Water Department | Alliance |
| City Water Department | Newark |
| City Water Department | Fostoria |
| City Water Department | Lorain |
| Civil Aeronautic Adm. | Oberlin |
| Civil Aeronautic Administration | Oberlin |
| Clark | Mansfield |
| Clark | Cleveland |
| Clark | Euclid |
| Clark Greater Cleve Garden Center | Cleveland |
| Clark Jl Steel | Cleveland |
| Clark Asbestos | Cleveland |
| Clark Asbestos | Cleveland |
| Clark Asbestos Co | Cleveland |
| Clark Asbestos Co. | Cleveland |
| Clark Asbestos Company | Cleveland |
| Clark Asbestos Company | Oberlin |
| Clark Asbestos Company | Lorain |
| Clark Asbestos Company | Cleveland |
| Clark Equipment Co | Lima |
| Clark Equipment Company | Cleveland |
| Clark Grave Vault Company | Columbus |
| Clark Refining And Marketing, Incorporated | Lima |
| Clarkins Department Store | Youngstown |
| Cleaver Brooks | Sunbury |
| Cleve Bearing Prod | Cleveland |
| Cleve Cap Screw Co | Cleveland |
| Cleveland Sandusky Brewing Corp. | Cleveland |
| Cleveland Ade Manufacturing Company | Carlton |
| Cleveland Aircraft | Avon |
| Cleveland Akron Bag Company | Cleveland |
| Cleveland Alloy | Berea |
| Cleveland And Elyria Electric Railway Company | Cleveland |
| Cleveland And Southwestern Railway Company | Norwalk |
| Cleveland And Southwestern Tractor Company | Elyria |
| Cleveland Arcade Company | Cleveland |
| Cleveland Arm H | Cleveland |
| Cleveland Armature | Cleveland |
| Cleveland Automobile Company | East Cleveland |
| Cleveland Axle Manufacturing Company | Canton |
| Cleveland Bakery | Cleveland |
| Cleveland Board Of Education | Cleveland |
| Cleveland Board Of Education Schools | Cleveland |
| Cleveland Builders Supply Co. | Cleveland |
| Cleveland Cap Screw Co | Cleveland |
| Cleveland Cap Screw Company | Cleveland |
| Cleveland Cap Screw Company | Cleveland |
| Cleveland City Cable Railway Company | Cleveland |
| Cleveland City Forge And Iron Company | Cleveland |
| Cleveland City Railway Company | Cleveland |
| Cleveland Cliffs Iron Company | Cleveland |
| Cleveland Clinic | Cleveland |
| Cleveland Clinic | Cleveland |
| Cleveland Clinic Foundation | Cleveland |
| Cleveland Clinic Foundation | Cleveland |
| Cleveland Clinic Foundation -power House | Cleveland |
| Cleveland Clinic Foundation, Main Penthouse | Cleveland |
| Cleveland Clinic Hospital | Cleveland |
| Cleveland Clinic Hospotal New E 90 St Wing | Cleveland |
| Cleveland Clinic New Wing | Cleveland |
| Cleveland Crane Engineering Company | Wickliffe |
| Cleveland Crane And Engineering Company | Wickliffe |
| Cleveland Crane And Engineering Company | Wickliffe |
| Cleveland Crane, Division Of Mcneil Machine And Engineering Company | Wickliffe |
| Cleveland Diesel Engine Division Of Gmc | Cleveland |
| Cleveland Diesel Engingeering Works, Division Of General Motors Corporation | Cleveland |
| Cleveland Electric Ill Co | Avon Lake |
| Cleveland Electric Illuminating Ashtabula Plant | Ashtabula |
| Cleveland Electric Illuminating Avon Lake Station | Avon Lake |
| Cleveland Electric Illuminating Avon Power Plant | Avon Lake |
| Cleveland Electric Illuminating Canal Rd Plt | Cleveland |
| Cleveland Electric Illuminating Clarkwood Ave | Cleveland |
| Cleveland Electric Illuminating East Lake Power Plant | Eastlake |
| Cleveland Electric Illuminating East Lake Station | East Lake |
| Cleveland Electric Illuminating Lake Shore | Cleveland |
| Cleveland Electric Illuminating Plt Miles Wh | Cleveland |
| Cleveland Electric Illuminating Co Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co. | Ashtabula |
| Cleveland Electric Illuminating Co. | Cleveland |
| Cleveland Electric Illuminating Co. | Astabula |
| Cleveland Electric Illuminating Co. | Avon Lake |
| Cleveland Electric Illuminating Co. | Perry |
| Cleveland Electric Illuminating Co. | Willoughby |
| Cleveland Electric Illuminating Co. | Independence |
| Cleveland Electric Illuminating Co. | Cleveland |
| Cleveland Electric Illuminating Co. | Willoughby |
| Cleveland Electric Illuminating Co.- Ashtabula Power Plant | Ashtabula |
| Cleveland Electric Illuminating Co.- Avon Lake Power Plant | Avon Lake |
| Cleveland Electric Illuminating Co.- Eastlake Power Plant | Eastlake |
| Cleveland Electric Illuminating Company | Avon Lake |
| Cleveland Electric Illuminating Company | Avon |
| Cleveland Electric Illuminating Company | Cleveland |
| Cleveland Electric Illuminating Company | Eastlake |
| Cleveland Electric Illuminating Company | Ashtabula |
| Cleveland Electric Illuminating Company | Ashtabula Harbor |
| Cleveland Electric Illuminating Company | Cleveland |
| Cleveland Electric Illuminating Company Eastlake Station | Eastlake |
| Cleveland Electric Light Company | Cleveland |
| Cleveland Electric Railway Company | Cleveland |
| Cleveland Electro Alloys | Cleveland |
| Cleveland Electro Metals | Cleveland |
| Cleveland Electrometals | Cleveland |
| Cleveland Elyria Electric Railway Company | Cleveland |
| Cleveland Elyria Electric Railway Company | Rockport |
| Cleveland Energy Resource | Cleveland |
| Cleveland Faucet Company | Cleveland |
| Cleveland Foundry Company | Cleveland |
| Cleveland Foundry Company | Cleveland |
| Cleveland Frog And Crossing Company | Cleveland |
| Cleveland Frog And Crossing Company | Newburg |
| Cleveland Furnace Company | Cleveland |
| Cleveland General Electric Company | Cleveland |
| Cleveland Graphite Bronze Co. | Cleveland |
| Cleveland Graphite Bronze Company | Cleveland |
| Cleveland Graphite Bronze Company | Caldwell |
| Cleveland Graphite Bronze Company | Caldwell |
| Cleveland Graphite Bronze Company | Cleveland |
| Cleveland Graphite Bronze Company | Cleveland |
| Cleveland Graphite Bronze Company | Cleveland |
| Cleveland Graphite Bronze Company | Caldwell |
| Cleveland Hardware Company | Cleveland |
| Cleveland Hippodrome Company | Cleveland |
| Cleveland Hopkins Airport | Cleveland |
| Cleveland Ice And Refigerating Company | Cleveland |
| Cleveland Laundry Company | Cleveland |
| Cleveland Medical Center | Cleveland |
| Cleveland Metal | Cleveland |
| Cleveland Metal Abrasive | Cleveland |
| Cleveland Metal Products Company | Cleveland |
| Cleveland Metro General Hospital | Cleveland |
| Cleveland Metropolitan Housing Authority Cedar Apartments | Cleveland |
| Cleveland Metropolitan General Hospital | Cleveland |
| Cleveland Metropolitan General Hospital | Cleveland |
| Cleveland Metropolitan Hospital | Cleveland |
| Cleveland Metropolitan Hospital North Building Phase 11a 3395 Scranton Road | Cleveland |
| Cleveland Metropolitan Hospital, North Building, Phase 11a, 3395 Scranton Rd. | Cleveland |
| Cleveland Metropolitan Housing Authority Cedar Apts. | Cleveland |
| Cleveland Milling Company | Cleveland |
| Cleveland Mine | Cleveland |
| Cleveland Museum Of Art | Cleveland |
| Cleveland Oak Belt | Cleveland |
| Cleveland Pneumatic | Cleveland |
| Cleveland Pneumatic Tool | Cleveland |
| Cleveland Precision | Cleveland |
| Cleveland Precision | Euclid |
| Cleveland Provision Company | Cleveland |
| Cleveland Provision Company | Cleveland |
| Cleveland Provision Company | Cleveland |
| Cleveland Public Library | Cleveland |
| Cleveland Public Power | Cleveland |
| Cleveland Quarries Company | South Amherst |
| Cleveland Quarries Company | Amherst |
| Cleveland Railway Company | Cleveland |
| Cleveland Railway Company | Cleveland |
| Cleveland Railway Company, Viaduct Power House | Cleveland |
| Cleveland Regional Sewer District | Cuyahoga Heights |
| Cleveland Regional Treatment Center | Cleveland |
| Cleveland Rubber Corporation | Cleveland |
| Cleveland Shipbuilding | Lorain |
| Cleveland Shopping News Company | Cleveland |
| Cleveland Stamping And Tool Company | Cleveland |
| Cleveland State Hospital | Cleveland |
| Cleveland State Univ. | Cleveland |
| Cleveland State University Classroom Lecture Building East 22nd Chester Avenue | Cleveland |
| Cleveland State University, Classroom Lecture Building, East 22nd Chester Ave. | Cleveland |
| Cleveland Stevedore Company | Huron |
| Cleveland Stone Company | North Amherst |
| Cleveland Thermal Energy | Cleveland |
| Cleveland Trust Company Building | Cleveland |
| Cleveland Twist Drill Company | Cleveland |
| Cleveland Twist Drill Company | Cleveland |
| Cleveland Union Terminals | Cleveland |
| Cleveland Water Condition | Cleveland |
| Cleveland Water Works | Cleveland |
| Cleveland Welding And Manufacturing Company | Cleveland |
| Cleveland Wire Spring Company | Cleveland |
| Cleveland Wire Plant | Cleveland |
| Cleveland Works | Cleveland |
| Cleveland Works Station 85-100 John E P Runty Pipe Shop | Cleveland |
| Cleveland Works East | Cleveland |
| Cleveland Worsted Mills Company | Ravenna |
| Cleveland Worsted Mills Company | Newburg |
| Cleveland Worsted Mills Company | Newburgh |
| Cleveland Worsted Mills Company | Cleveland |
| Cleveland Worsted Mills Company | Newburgh |
| Cleveland Worsted Mills Company | Ravenna |
| Cleveland Worster Mills Company | Ravenna |
| Cleveland, Berea, Elyria And Oberlin Railway Company | Cleveland |
| Cleveland, Berea, Elyria And Oberlin Railway Company | Elyria |
| Cleveland, Cincinnati, Chicago And St. Louis Railway | Columbus |
| Cleveland, Cincinnati, Chicago And St. Louis Railway | Sharonville |
| Cleveland, Cincinnati, Chicago And St. Louis Railway | Bellefontaine |
| Cleveland, Cincinnati, Chicago And St. Louis Railway Company | Sharonville |
| Cleveland, Cincinnati, Chicago And St. Louis Railway Company | Bellefontaine |
| Cleveland, Cincinnati, Chicago And St. Louis Railway Company | Linndale |
| Cleveland, Cincinnati, Chicago And St. Louis Railway Company | Linndale |
| Cleveland, Elyria And Western Railway | Elyria |
| Cleveland, Painesville And Ashtabula Railroad Company | Cleveland |
| Cleveland, Painesville And Eastern Railroad Company | Cleveland |
| Cleveland, Painesville And Eastern Railroad Company | Willonghby |
| Cleveland, Painesville And Eastern Railroad Company | Cleveland |
| Cleveland, Painesville And Eastern Railroad Company | Willoughby |
| Cleveland, Painesville And Eastern Traction Company | Painesville |
| Cleveland, Southwestern And Columbus Railway Company | Elyria |
| Cleveland, Southwestern And Columbus Railway Company | Cleveland |
| Cleveland, Southwestern And Columbus Railway Company | Elyria |
| Clevite | Mcconnelsville |
| Clevite Corporation | Cleveland |
| Clevite Corporation | Cleveland |
| Clevite Corporation | Bedford |
| Clevite Engine | Cleveland |
| Clevite Harris Products | Milan |
| Clevite Research Center | Cleveland |
| Clevite Research Center | Cleveland |
| Climax Tire And Rubber Company | Delaware |
| Clopay Building | Cincinnati |
| Clover Leaf Speedway | Cleveland |
| Cloverleaf High School | Canton |
| Cloverleaf School | Canton |
| Cloverleaf Speedway | Cleveland |
| Clow Corporation | Coshocton |
| Club Monarch | Cleveland |
| Club Products | Cleveland |
| Clyde Porcelain Steel Corporation | Clyde |
| Clyde Porcelain Steel Corporation | Clyde |
| Clyffside Brewing Company | Cincinnati |
| Coca Cola Bottling Company | Cincinnati |
| Coe Mfg. | Painesville |
| Cognis Corporation | Cincinnati |
| Coit Road Plant | Cleveland |
| Coke Plant | Youngstown |
| Col Whse | Columbus |
| Cold Metal Products | Youngstown |
| Cole-layer Trumble Company | Dayton |
| Colin Gardner Paper Company | Middletown |
| Collective Contract | Cincinnati |
| Colonial Refining Chemicals | Cleveland |
| Colonial Refining Chemicals | Cleveland |
| Colonial Salt Company | South Akron |
| Colonial Terrace Apartments | Middletown |
| Columbia Axle Company | Cleveland |
| Columbia Cement Company | East Fultonham |
| Columbia Cement Company | East Fultonham |
| Columbia Cement Corporation | East Fultonham |
| Columbia Cement Corporation | Zanesville |
| Columbia Chemical | Ironton |
| Columbia Chemical Company | Barberton |
| Columbia Chemical Divisioin | Fultonham |
| Columbia Chemical Division | Barberton |
| Columbia Gas Systems | Columbia |
| Columbia Gas Systems | Green Springs |
| Columbia H.c.a. Healthcare | Canton |
| Columbia Ice Company | Cleveland |
| Columbia Lng | Green Springs |
| Columbia Lng., Incorporated | Green Springs |
| Columbia Power Company | Cincinnati |
| Columbia Southern | Canton |
| Columbia Southern Cement | Barberton |
| Columbia Southern Chemical | Barberton |
| Columbia Southern Chemical Company | Barberton |
| Columbia Southern Chemical Corp. | Barberton |
| Columbia Southern Chemical Corp. | Canton |
| Columbia Southern Chemical Corporation | Barberton |
| Columbia Southern Chemical Corporation, Subsidiary Of Pittsburgh Plate And Glass | Barberton |
| Columbia Southern Personal Bldg. | Canton |
| Columbia Tire And Rubber Company | Columbiana |
| Columbian Storage Plant Columbian Storage | Beloit |
| Columbiana Southern Church | Columbiana |
| Columbua Southern Ohio Electric Company | Columbia |
| Columbus Southern Ohio Electric Conesville Generating Station | Conesville |
| Columbus Southern Ohio Electric | Columbus |
| Columbus Southern Ohio Electric | Conesville |
| Columbus Southern Ohio Electric Picway Station | Columbus |
| Columbus Southern Ohio Electric (conesville Generating Sta.) | Conesville |
| Columbus Southern Ohio Electric (picway Station) | Lockbourne |
| Columbus Southern Ohio Electric (poston Station) | Athens |
| Columbus Southern Ohio Electric Co | Columbus |
| Columbus Southern Ohio Electric Co. | |
| Columbus Southern Ohio Electric Co. | |
| Columbus Southern Ohio Electric Co. | |
| Columbus Southern Ohio Electric Co. | Conesville |
| Columbus Southern Ohio Electric Co. | Lockburne |
| Columbus Southern Ohio Electric Company | Groveport |
| Columbus Aircraft Div. | Columbus |
| Columbus And Iron And Steel Company | Columbus |
| Columbus And Southern Ohio Electric Company | Conesville |
| Columbus And Southern Ohio Electric Company | Graveport |
| Columbus And Southern Ohio Electric Company Conesville Station | Coshocton |
| Columbus Bolt Works | Columbus |
| Columbus Buggy Company | Columbus |
| Columbus Center Bldg | Columbus |
| Columbus Center Building | Columbus |
| Columbus Central Railway Company | Columbus |
| Columbus Central Railway Company | Columbus |
| Columbus Coated Fabrics | Columbus |
| Columbus Consolidated Street Railroad Company | Columbus |
| Columbus Edison Electric Light Company | Columbus |
| Columbus Edison Electric Light Company | Columbus |
| Columbus Electric Light And Power Company | Columbus |
| Columbus General Depot | Columbus |
| Columbus Iron And Steel Company | Columbus |
| Columbus Iron And Steel Company | South Columbus |
| Columbus London And Springfield Street Railway Company | Midway |
| Columbus London And Springfield Street Railway Company | Springfield |
| Columbus Oil Cloth Company | Columbus |
| Columbus Packing Company | Columbus |
| Columbus Public Service Company | Columbus |
| Columbus Py Power Light Company | Columbus |
| Columbus Py Power Light Company | Walnut Station |
| Columbus Railway And Light Company | Columbus |
| Columbus Railway Company | Columbus |
| Columbus Railway Power Light Company | Columbus |
| Columbus Railway Power Light Company | Groveport |
| Columbus Savings And Trust Company | Columbus |
| Columbus Sewage Pumping Station | Columbus |
| Columbus Shops | Columbus |
| Columbus Show Case Company | Columbus |
| Columbus Southern Power | Conesville |
| Columbus St. School | Columbus |
| Columbus State Hospital | Columbus |
| Columbus State Institute | Columbus |
| Columbus Steam And Furnace Coal Company | Broadwell |
| Columbus Steel Company | Columbus |
| Columbus Stove | Columbus |
| Columbus Street Railway Company | Columbus |
| Columbus Warehouse | Columbus |
| Columbus Woolen Manufacturing Company | Columbus |
| Columbus, Buckeye, Lake And Newark Traction Company | Hebron |
| Combined Normal And Industrial Department | Wilberforce |
| Combustion Engineering | Miamisburg |
| Commercial Bookbinding Company | Cleveland |
| Commercial Forging Company | Cleveland |
| Commercial Forgings | Cleveland |
| Commercial Insulation Co | Youngstown |
| Commercial Insulation Company | Youngstown |
| Commercial Intertech | Youngstown |
| Commercial Intertech Shearing | Warren |
| Commercial Intertech Shearing | Youngstown |
| Commercial Intertech Shearing | Warren |
| Commercial Intertech Shearing | Youngstown |
| Commercial Milling Company | Cleveland |
| Commercial Piping | Youngstown |
| Commercial Shearing | Youngstown |
| Commercial Shearing Stamping Company | Youngstown |
| Commonwealth And Southern Corporation | Toronto |
| Community Hospital | Springfield |
| Compco Metal Products | Youngstown |
| Complete Insulation Company | Dayton |
| Complete Insulation Service Inc. | Dayton |
| Conagra | Perrysburgh |
| Concrete Mason | Elyria |
| Conesville Power Plant | Conesville |
| Conesville Power Plant | Conesville |
| Conesville Power Station | Conesville |
| Conneaut Die Casting | Conneaut |
| Conneaut Electric Light Company | Conneaut |
| Conneaut Shovel Company | Conneaut |
| Connector Ind. Of Am. | Cin |
| Connex | Marietta |
| Conrail | Youngstown |
| Conrail | Bellefontaine |
| Conrail | Buckeye |
| Consol. Iron | Cleveland |
| Consolidated Aluminum | Hannibal |
| Consolidated Aluminum Corp. | Hannibal |
| Consolidated Biscuit Comp | Mccomb |
| Consolidated Biscuit Company | Mc Comb |
| Consolidated Engineering | Cleveland |
| Consolidated Rail Corporation | Toledo |
| Consolidated Railroad (conrail) Shops | Not Provided |
| Consolidated Railway Corporation | Hobson |
| Consolidated Railway Corporation, New York Central Railroad | Walbridge |
| Consolidated Street Railway Company | Toledo |
| Consolidated Telephone 5240 Lester Road | Cincinnati |
| Constellation Steel Mill | Cincinnati |
| Consumers Brewing Company | Newark |
| Cont. Bakeries | Cleveland |
| Container Corp Of America | Circleville |
| Container Corp.* | Cincinatti |
| Container Corporation | Cincinnati |
| Container Corporation | Cincinnati |
| Container Corporation Blue Ash Industrial Park 9960 Alliance Road | Cincinnati |
| Container Corporation Of America | Circleville |
| Container Corporation Of America | Red Bank |
| Container Corporation Of America | Cincinnati |
| Container Corporation Of America | Circleville |
| Container Corporation Of America | Circleville |
| Continental Aviation And Engineering Company | Toledo |
| Continental Can | Columbus |
| Continental Can Co | Van Wert |
| Continental Can Co. | Van Wert |
| Continental Can Company, Incorporated | Mt Vernon |
| Continental Hospital | Westlake |
| Continental Oil Co. | |
| Continental Sugar Company | Findlay |
| Continental Sugar Company | Fremont |
| Continental Sugar Company | Fremont |
| Convention Hall | Cincinnati |
| Conwell Quality Tools | Mogadare |
| Cook Well Strainer Company | Cincinnati |
| Cooke Greenhouse | Cleveland |
| Cooper Bessemer | Mount Vernon |
| Cooper Energy Serv | Mount Vernon |
| Cooper Energy Serv | Springfield |
| Copper Corner | Cleveland |
| Copper Corner | Lakewood |
| Copperly Corporation | Cleveland |
| Copperweld Steel | Warren |
| Copperweld Steel | Warren |
| Copperweld Steel | Champion |
| Copperweld Steel | Lordstown |
| Copperweld Steel | Warren |
| Copperweld Steel | Warren |
| Copperweld Steel | Warren |
| Copperweld Steel | Warren |
| Copperweld Steel Company | Warren |
| Copperweld Steel Company | Warren |
| Corcoran Brown Lamp, Division Electric Auto Lite Company | Sharonville |
| Corhart | Buckhannon |
| Corning Glass | Greenville |
| Corning Glass Works | Greenville |
| Corning Glass Works Greenville Plant | Greenville |
| Cornwell Quality Tools | Mogadore |
| Cornwell Quality Tools | Mogadare |
| Correct Air Corp. | Willoughby |
| Corrigan-mckenney Steel Company | Cleveland |
| Corrigan-mckenney Steel Company | Cleveland |
| Coryville Ice Company | Cincinnati |
| Coshocton Division | Coshocton |
| Coshocton Light And Heating Company | Coshocton |
| Coshocton Straw Paper Company | Coshocton |
| Coshocton Straw Paper Company | Coshocton |
| Cottage Creamery Co | Orrville |
| Cotton Malleable | Canton |
| Cotton Malleable Iron Co | Canton |
| Coulton Chemical | Oregon |
| Coulton Chemical Co | Oregon |
| Courier Journal Condenser Line | Louisville |
| Cp Wright Co At St. Anns Hospital | Cleveland |
| Crane Breed Casket Company | Cincinnati |
| Crane Company | Alliance |
| Crane Company | Canton |
| Crawford Power | Cincinnati |
| Crawford Steel Construction | Cincinnati |
| Crawford Taylor, Branch Of Us Baking Company | Mansfield |
| Creedmore Cartridge Company | Barberton |
| Crescent Building | Cincinnati |
| Crescent Works | Cleveland |
| Crest Hills Junior High School Seymoure East Lawn | Cincinnati |
| Cromwell Steel Company | Lorain |
| Crosley Division, Avco Manufacturing Corporation | Cincinnati |
| Crosley Radio Corporation | Cincinnati |
| Cross Creek Coal Company | New Philadelphia |
| Cross Pointe Paper Corporation | Dayton |
| Cross Pointe Paper Corporation | West Carrollton |
| Crouse Clay Products Company | Akron |
| Crowell Publishing Company | Springfield |
| Crown Rubber Co | Fremont |
| Crown Rubber Company | Fremont |
| Crown Rubber Company | Fremont |
| Crown Rubber Stamp | Cleveland |
| Crown Zellerbach Corporation | Baltimore |
| Crucible Steel | Cleveland |
| Crucible Steel | Norwalk |
| Cryogenics Lab | Perry Township |
| Crystal Ice And Cold Storage Company | Youngstown |
| Crystal Springs Ice Company | Cumminsville |
| Crystal Springs Ice Company | Cincinnati |
| Crystal Tissue Co Power Plant | Middletown |
| Crystal Tissue Company | Middletown |
| Csx | Columbus |
| Csx/bando/bando Shops | Not Provided |
| Custodial Farm | Orient |
| Custom Machine, Inc. | Cleveland |
| Cuyahoga County Hospital | Warrensville |
| Cuyahoga County Hospital | Warrenville |
| Cuyahoga Greenhouse | Cleveland |
| Cuyahoga Light Company | Cleveland |
| Cuyahoga Lime Company | Cleveland |
| Cuyahoga Soap Company | Cleveland |
| Cuyahoga Valley Railway | Cleveland |
| Cuyahoga Works | Cleveland |
| Cyclops Corp Empire Reev | Mansfield |
| Cyclops Corporation | Mansfiled |
| Name | City |
|---|