Places beginning with CA in Ohio, United States
- Cabinet
- Cabinville (historical)
- Cable
- Cadiz
- Cadiz Junction
- Cadiz, Township of
- Cadmus
- Caesars Creek, Township of
- Cairo
- Cairo
- Calais
- Calamoutier
- Calcutta
- Caldwell
- Caldwells Addition
- Caledonia
- California
- Calla
- Calm (historical)
- Calumet
- Camba
- Cambridge
- Cambridge, Township of
- Camden
- Camden
- Camden, Township of
- Cameron
- Camp
- Campbell
- Campbell, City of
- Campbellsport
- Campbellstown
- Camp Bennett
- Camp Calvary
- Camp Creek
- Camp Creek, Township of
- Camp Dennison
- Camp Luther
- Camp Oyo
- Camp Park
- Camp Roosevelt
- Campus
- Camp Washington
- Canaan
- Canaan, Township of
- Canaan, Township of
- Canaan, Township of
- Canaan, Township of
- Canaanville
- Canada (historical)
- Canal Fulton
- Canal Lewisville
- Canalport
- Canal Winchester
- Candlelight Villas (subdivision)
- Candyce Grove (subdivision)
- Candy Town
- Canfield
- Canfield, Township of
- Cannelville
- Cannon
- Cannonsburg
- Cannons Creek
- Cannons Mill
- Canton
- Canton, City of
- Canton Gardens (subdivision)
- Canton Road
- Canton, Township of
- Canyon Park
- Canyon Villa Estates
- Captina
- Carbondale
- Carbon Hill
- Cardington
- Cardington, Township of
- Carey
- Carey
- Careytown
- Carletonville
- Carlisle
- Carlisle
- Carlisle, Township of
- Carlton
- Carlwick (historical)
- Carman
- Carmel
- Carmonte
- Caroline
- Carpenter
- Carpenters Addition (subdivision)
- Carpenters Corners
- Carpenters Mobile Home Park (subdivision)
- Carrington
- Carrington Woods (subdivision)
- Carroll
- Carroll County
- Carrollton
- Carroll, Township of
- Carroll View Terrace (subdivision)
- Carrothers
- Carryall, Township of
- Carsey Town
- Cars Run (historical)
- Carter (historical)
- Carters (historical)
- Carthage
- Carthagena
- Carthage, Township of
- Carthon
- Carysville
- Cascade
- Cascade (historical)
- Cassell
- Cassella
- Cassellview
- Casstown
- Cass, Township of
- Cass, Township of
- Cass, Township of
- Cassville
- Castalia
- Caster Subdivision
- Castine
- Catawba
- Catawba Island
- Catawba Island, Township of
- Catawba Station
- Catbird
- Cavallo
- Cavett
- Cawthorn
- Caywood