- Joplin, Missouri
- Joshua Tree, California
- Jourdanton, Texas
- Jupiter, Florida
- Justin, Texas
- Kahuku, Hawaii
- Kalamazoo, Michigan
- Kalkaska, Michigan
- Kansas City, Kansas
- Kansas City, Missouri
- Katy, Texas
- Kaufman, Texas
- Keene, New Hampshire
- Keller, Texas
- Kennebunkport, Maine
- Kenner, Louisiana
- Kennesaw, Georgia
- Kennett, Missouri
- Kennewick, Washington
- Kent, Ohio
- Kentfield, California
- Kentwood, Louisiana
- Kerrville, Texas
- Kewadin, Michigan
- Kiawah Island, South Carolina
- Kill Devil Hills, North Carolina
- Killeen, Texas
- King, North Carolina
- Kingsland, Georgia
- Kingsport, Tennessee
- Kingston, Rhode Island
- Kirksville, Missouri
- Kirkwood, California
- Kissimmee, Florida
- Kittanning, Pennsylvania
- Knoxville, Tennessee
- Koloa, Hawaii
- Kutztown, Pennsylvania
- La Jolla, California
- La Quinta, California
