- Channel Rock
- Channel Rock Island
- Chatto Island
- Clam Island
- Closson Island
- Colt Head Island
- Compass Island
- Conary Island
- Conary Nub
- Coombs Islands
- Coot Islands
- Cow Island
- Cow Island
- Cranberry Island
- Cranes Corners
- Crimmins Island
- Crotch Island
- Crow Island
- Crow Island
- Crow Island
- Crow Island
- Crow Island
- Crow Island
- Current Island
- Cabbage Island
- Camp Wavus
- Cape Island
- Capitol Island
- Carlisle Island
- Cedar Grove