- Clarks Summit
- Clarkdale
- Clark Mills
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- Clarion
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- Clarence
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- Claremont
- Clare
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- Citrus Park
- Citrus Park
- Citrus Park
- Citrus Hills
- Citrus Heights
- Citrus City
- Citrus
- Citronelle
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- Circle Pines
- Cinnaminson
- Cinco Ranch
- Cimarron Hills
- Cimarron
- Cienegas Terrace
- Cicero
- Cicero
- Cibolo
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- Churchville
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- Chuluota
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- Chillicothe
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- Chestnut Ridge
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- Chesterton
- Chesterland
- Chesterfield Court House
- Chesterfield
- Chesterfield
