- King Island
- King Island
- Kingfield
- Kingman
- Kings Grove
- Kingsbury
- Kinney Shores
- Kittery
- Kittery Foreside
- Kittery Island
- Kittery Point
- Knight Corner
- Knight Island
- Knights Corner
- Knights Landing
- Knightville
- Knowles Corner
- Knowlton Corner
- Knowltons Corner
- Knox Center
- Knox Corner
- Knox Hill Corner
- Knox Ledge Corner
- Kokadjo
- Kole Kill Island