- Castle Harmony
- Castle Island
- Castle Island
- Castle Island
- Castle Rock
- Cathance
- Catnip Island
- Caton Island
- Causeway Island
- Cedar
- Cedar Grove
- Cedar Island
- Cedar Island
- Cedar Island
- Cedar Island
- Cedar Ledges
- Cedarbush Island
- Center
- Center Belmont
- Center Island
- Center Island
- Center Island
- Center Lebanon
- Center Lovell
- Center Minot
- Center Montville
- Center Vassalboro
- Centerville
- Central Landing
- Chadbournes Mills