- Knapps Corner
- Knappville
- Knickerbocker Corner
- Knight Creek
- Knight Settlement
- Knights Eddy
- Knob Island
- Knoll Spring Park
- Knolls Trailer Court
- Knollwood Manor
- Knowelhurst
- Knowlesville
- Knowlesville Station
- Knox
- Knoxboro
- Kohlertown
- Komar Park
- Kortright Center
- Kortright Station
- Kossuth
- Kosterville
- Kraus Landing
- Kringsbush
- Kripplebush
- Krum Corner
- Krumville
- Kuckville
- Kuneytown
- Kyserike
- Kysorville