- Jacksonville, Illinois
- Jamaica, New York
- Janesville, Wisconsin
- Jefferson City, Missouri
- Jefferson, Georgia
- Jefferson, Indiana
- Jekyll Island, Georgia
- Jena, Louisiana
- Jenks, Oklahoma
- Jersey City, New Jersey
- Jesup, Georgia
- Johns Creek, Georgia
- Johnson City, Tennessee
- Johnstown, Pennsylvania
- Jones, Oklahoma
- Jonesboro, Arkansas
- Jonesboro, Georgia
- Jonesborough, Tennessee
- 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
- Keene, New Hampshire
- Keller, Texas
- Kennebunkport, Maine
- Kenner, Louisiana
- Kennesaw, Georgia
- Kennett, Missouri
- Kennewick, Washington
- Kent, Ohio
- Kentfield, California
- Kentwood, Louisiana
- Kerrville, Texas
