- La Canada Flintridge
- La Crescenta
- La Grange
- La Mirada
- La Puente
- La Verne
- Lackawanna County
- Lackey
- Ladera Heights
- Lady Lake
- Laguna Beach
- Lake Bluff
- Lake Buena Vista
- Lake County (Florida)
- Lake County (Illinois)
- Lake County (Indiana)
- Lake Forest
- Lake Geneva
- Lake Grove
- Lake Mary
- Lake Nona
- Lake View Terrace
- Lake Wales
- Lake Worth
- Lake Zurich
- Lake Zurich
- Lakeview (Chicago, Illinois)
- Lakeview (Nassau, New York)
- Lakeview East
- Lakewood
- Lambertville
- Lancaster (Lancaster, Virginia)
- Lancaster (Los Angeles, California)
- Lancaster County (Pennsylvania)
- Lancaster County (Virginia)
- Landover
- Lanexa
- Langley Air Force Base
- Lantana
- LaPorte County
- Larchmont Village
- Largo
- Las Vegas
- Lauderdale Lakes
- Lauderhill
- Laurel
- Laurelton
- Laurys Station
- Lawndale (Chicago, Illinois)
- Lawrence
- Lazy Lake
- Leather Corner Post
- Lebanon
- Lee
- Lee Vista
- Leesburg
- Lefrak City
- Lehigh County
- Leimert Park
- Leithsville
- Lenhartsville
- Lenox Hill
- Levittown
- Lewes
- Lexington (Lexington, Virginia)
- Libertyville
- Lido Beach
- Lightfoot (James City, Virginia)
- Lightfoot (York, Virginia)
- Lighthouse Point
- Limeport
- Lincoln Heights
- Lincoln Park
- Lincoln Square (Chicago, Illinois)
- Lincoln Square (Manhattan, New York)
- Lincolnshire
- Lincolnwood
- Lindenhurst (Babylon, New York)
- Lindenwood
- Linthicum
- Lisbon (New London, Connecticut)
- Lisle
- Litchfield (Litchfield, Connecticut)
- Litchfield County
- Little Ethiopia
- Little Havana
- Little Italy (Baltimore, Maryland)
- Little Italy (Chicago, Illinois)
- Little Italy (Manhattan, New York)
- Little Neck
- Little Rock
- Little Tokyo
- Little Village
- Livermore
- Lloyd Harbor
- Lockport
- Locust Point
- Locust Valley
- Logan Square
- Lomita
- Long Beach (Los Angeles, California)
- Long Beach (Nassau, New York)
- Long Grove
- Long Island City
- Longswamp
- Longwood (Bronx, New York)
- Longwood (Seminole, Florida)
- Los Feliz
- Loudoun County
- Louisville
- Lower East Side
- Lyme
- Lynbrook
- Lynnport
- Lynnville
- Lynwood
- Lynwood