- La Canada
- La Canada Flintridge
- La Canada-flintridge
- La Crescenta
- La Grange
- La Habra
- La Habra Heights
- La Honda
- La Jolla
- La Mesa
- La Mirada
- La Palma
- La Puente
- La Quinta
- La Verne
- Ladera Ranch
- Lafayette
- Laguna Beach
- Laguna Hills
- Laguna Niguel
- Laguna Woods
- Lagunitas
- Lahabra
- Lake Arrowhead
- Lake Balboa
- Lake City
- Lake Crowley
- Lake Elsinore
- Lake Forest
- Lake Forest,
- Lake Hughes
- Lake Isabella
- Lake Los Angeles
- Lake San Marcos
- Lake Tahoe
- Lake View Terrace
- Lakehead
- Lakeport
- Lakeshore
- Lakeside
- Lakeview
- Lakewood
- Lamesa
- Lamont
- Lancaster
- Landers
- Larkfield-wikiup
- Larkspur
- Lathrop
- Laton
- Lawndale
- Laytonville
- Le Grand
- Lebec
- Lee Vining
- Leggett
- Lemon Cove
- Lemon Grove
- Lemoore
- Lennox
- Leona Valley
- Leucadia
- Lewiston
- Likely
- Lincoln
- Lincoln Heights
- Linda
- Linden
- Lindsay
- Little River
- Littlerock
- Live Oak
- Livermore
- Livingston
- Llano
- Loch Lomond
- Lockeford
- Lockwood
- Lodi
- Loleta
- Loma Linda
- Loma Mar
- Lomita
- Lompoc
- Lone Pine
- Long Barn
- Long Beach
- Lookout
- Loomis
- Los Alamitos
- Los Alamos
- Los Altos
- Los Angeles
- Los Banos
- Los Cerritos
- Los Feliz
- Los Gatos
- Los Molinos
- Los Olivos
- Los Osos
- Lost Hills
- Lotus
- Lower Lake
- Loyalton
- Lucerne
- Lucerne Valley
- Ludlow
- Lynwood
- Lyoth
- Lytle Creek