Cities in Franklin County, United States ( 250 )
- Knottsville, Kentucky
- La Habra
- La Palma, California
- Ladera Ranch
- Laguna Beach
- Laguna Hills
- Laguna Niguel
- Laguna Woods
- Lake Barcroft
- Lake Forest, California
- Lake Success, New York
- Lakeview, New York
- Lakewood, Colorado
- Las Flores, California
- Latimer, Mississippi
- Laurens, South Carolina
- Lawrence, New York
- Levittown, New York
- Lido Beach, New York
- Lincolnia
- Locust Valley
- Long Beach
- Lorton, Virginia
- Los Alamitos, California
- Lynbrook
- Malvern, Arkansas
- Malverne
- Mandan
- Manhasset
- Manhasset Hills
- Manorhaven
- Mantua, Virginia
- Massapequa
- Massapequa Park
- McCordsville
- McLean, Virginia