- Comma Island
- Composite Island
- Conclusion Island
- Cone Island
- Cone Island
- Cone Island
- Coney Island
- Cook Island
- Coon Island
- Cooper Island
- Cooper Islands
- Cooper Landing
- Coposo Island
- Copper Center
- Copperville
- Cora Island
- Cordova
- Corlies Islands
- Cormorant Island
- Cormorant Island
- Coronados Islands
- Coronation Island
- Corwin Rock
- Cos Jacket
- Cottle Island
- Cottonwood
- Cottonwood
- Cottonwood Island
- Cottonwood Islands
- Cottonwood, Matanuska-Susitna