C
- Caborn
- Cadiz
- Cairo
- Calcutta
- Cale
- Caledonia
- Cambria
- Cambridge City
- Camby
- Camden
- Cammack
- Campbellsburg
- Campbelltown
- Camp Brosend
- Camp Roberts
- Canaan
- Cannelburg
- Cannelton
- Canton
- Capehart
- Cape Sandy
- Carbon
- Carbondale
- Carefree
- Carlisle
- Carlos
- Carmel
- Carp
- Carpentersville
- Carrollton
- Cartersburg
- Carthage
- Carwood
- Cary
- Cass
- Cassville
- Castleton
- Cataract
- Cates
- Catlin
- Cato
- Cayuga
- Cedar
- Cedar Farm Landing
- Cedar Grove
- Cedar Lake
- Cedarville
- Celestine
- Celina
- Cementville
- Centenary
- Centennial
- Center
- Center
- Center
- Center Point
- Center Square
- Centerton
- Center Valley
- Centerville
- Central
- Central Barren
- Chain-O-Lake
- Chalmers
- Chambersburg
- Chandler
- Chapel Hill
- Chapel Hill
- Charlestown
- Charle Sumac Estates
- Charlotte
- Chase
- Chatterton
- Chelsea
- Cherry Grove
- Cherryvale
- Chesterfield
- Chesterton
- Chesterville
- Chestler
- Chestnut Ridge
- Chetwynd
- Chili
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- Cincinnati
- Cincinnati
- Circleville
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- Clare
- Clarke Junction
- Clarks
- Clarksburg
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- Clark Siding
- Clarksville
- Claybank
- Clay City
- Claypool
- Claysville
- Clayton
- Clear Creek
- Clear Lake
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- Cleveland
- Clifford
- Clifton
- Clifton
- Clinton
- Clinton Falls
- Cloverdale
- Cloverland
- Clover Village
- Clunette
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- Coal City
- Coal Creek
- Coalmont
- Coatesville
- Coats Spring
- Coburg
- Cochran
- Coe
- Coesse
- Cofield Corner
- Coke Oven Hollow
- Colburn
- Cold Springs
- Cold Springs
- Cole
- Colfax
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- College Corner
- College Crest
- Collegeville
- Collett
- Collins
- Coloma
- Columbia
- Columbia City
- Columbus
- Commiskey
- Como
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- Concord
- Connersville
- Conrad
- Converse
- Coolwood Acres
- Cope
- Coral Bluff
- Coreyville
- Corkwell
- Corn Brook
- Cornelius
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- Corning
- Correct
- Cortland
- Corunna
- Corwin
- Corwin
- Cory
- Corydon
- Corydon Junction
- Cosperville
- Cottage Grove
- Country Club Heights
- County Squire Lakes
- Courter
- Covington
- Cowan
- Coxton
- Coxville
- Cradick Corner
- Craig
- Craigville
- Crandall
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- Crawford
- Crawfordsville
- Crawleyville
- Cresco
- Crestlawn
- Creston
- Creston
- Crestwood
- Crete
- Crisman
- Crocker
- Cromwell
- Crooked Lake
- Cross Plains
- Cross Roads
- Cross Roads
- Crothersville
- Crown Center
- Crown Point
- Crows Nest
- Crumstown
- Crystal
- Cuba
- Cuba
- Culver
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- Curryville
- Curtisville
- Cutler
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- Cynthiana
- Cypress