- Cold Brook
- Coolidge Corner
- Corinna Center
- Cow Island
- Craig Island
- Cranberry Island
- Crocker Turn
- Crockertown
- Cherryfield
- Chesterville
- Center Island
- Clark Island
- Cole Corner
- Cook Island
- China
- Chisholm
- Campbell Island
- Carleton Ledges
- Castle Island
- Castle Island
- Castle Rock
- Cathance
- Cornish Island
- Cow Island
- Crawford Island
- Crow Island
- Crow Island
- Crow Islands
- Cass Corner
- Castle Harmony