- La Crescenta
- La Crosse
- La Follette
- La Grange
- La Jolla
- La Mesa
- La Mirada
- La Moille
- La Pine
- La Plata
- La Ward
- Labelle
- Lacey
- Ladera Ranch
- Ladson
- Lady Lake
- Lafayette
- Lafayette Hill
- Lago Vista
- Laguna Hills
- Laguna Woods
- Lake
- Lake Bluff
- Lake Buena Vista
- Lake Butler
- Lake Charles
- Lake City
- Lake Forest
- Lake Lure
- Lake Mary
- Lake Monroe
- Lake Oswego
- Lake Panasoffkee
- Lake Park
- Lake Placid
- Lake Suzy
- Lake Villa
- Lake Wales
- Lake Worth
- Lake Worth Beach
- Lake Wylie
- Lake Zurich
- Lakeland
- Lakeville
- Lakeway
- Lakewood
- Lakewood Ranch
- Lambertville
- Lamont
- Lancaster
- Land O Lakes
- Landisburg
- Langhorne
- Lanham
- Lansdale
- Lansdowne
- Lansing
- Lantana
- Larchmont
- Laredo
- Largo
- Larkspur
- Las Cruces
- Las Vegas
- Lauderdale By the Sea
- Lauderdale Lakes
- Lauderhill
- Laurel
- Lawrence
- Lawrence Township
- Lawrenceville
- Lawton
- Layton
- Laytonsville
- League City
- Lealman
- Leander
- Leawood
- Levant
- Levittown
- Lewes
- Lewis Center
- Lewisburg
- Lewisville
- Lexington
- Liberty Township
- Lighthouse
- Lighthouse Point
- Lincoln
- Lincoln Park
- Lincolnshire
- Lincolnton
- Lincolnville
- Lincolnwood
- Linden
- Lindenhurst
- Linthicum
- Linwood
- Lisle
- Litchfield
- Lithia
- Lithonia
- Lititz
- Little Falls
- Little Neck
- Little Rock
- Little Silver
- Little Torch Key
- Littleton
- Live Oak
- Livermore
- Livingston
- Livonia
- Lloyd
- Lloyd Harbor
- Lobeco
- Lockport
- Locust Valley
- Logan
- Logansport
- Loganville
- Lolo
- Lombard
- Lompoc
- London
- Lone Tree
- Long Beach
- Long Branch
- Long Island City
- Longboat Key
- Longmeadow
- Longmont
- Longs
- Longwood
- Lookout Mountain
- Lorton
- Los Alamitos
- Los Alamos
- Los Altos
- Los Angeles
- Los Gatos
- Loudon
- Loughman