Northern Marin towns include Novato as well as certain areas of San Rafael. Novato has a total of 4 zip codes.
Southern Marin towns include Sausalito, Mill Valley, Tiburon and Belvedere. Five distinct zip codes define the area known as South Marin.
Central Marin towns include Corte Madera, San Quentin, Greenbrae, Larkspur, Kentfield, Ross, San Anselmo, Fairfax, and San Rafael.
Western Marin towns include San Geronimo, Woodacre, Pt. Reyes Station, Stinson Beach, Bolinas, Nicasio, Lagunitas, Marshall, Olema, Forest Knolls, and Tomales. Thirteen zip codes define the area known as West Marin.