Marin County, CA ZIP Codes & Directory
Complete postal guide for Marin County, California. Featuring the official county seat of San Rafael, largest municipality San Rafael, and serving 18 incorporated municipal entities.
Municipalities Located in Marin County
Incorporated Cities, Towns, and Villages
Belvedere Tiburon
cityZIPs: 94920
Bolinas
cityZIPs: 94924
Corte Madera
cityZIPs: 94925
Fairfax
cityZIPs: 94930
Greenbrae
cityZIPs: 94904
Inverness
cityZIPs: 94937
Larkspur
cityZIPs: 94939
Marshall
cityZIPs: 94940
Mill Valley
cityZIPs: 94941
Nicasio
cityZIPs: 94946
Novato
cityZIPs: 94945, 94947 , +1 more
Point Reyes Station
cityZIPs: 94956
San Anselmo
cityZIPs: 94960
San Quentin
cityZIPs: 94974
San Rafael
cityZIPs: 94901, 94903
Sausalito
cityZIPs: 94965
Stinson Beach
cityZIPs: 94970
Valley Ford
cityZIPs: 94972
Active USPS ZIP Codes in Marin County
Standard delivery zones and geographic service boundaries
Frequently Asked Questions About Marin County, CA
What is the county seat and largest city in Marin County? ▾
The official county seat of Marin County is San Rafael, and its largest incorporated municipality by population is San Rafael.
How many cities, towns, and villages are in Marin County? ▾
Marin County encompasses 18 incorporated municipal entities, including 18 cities, 0 towns, and 0 villages.
What is the total population and land area of Marin County? ▾
According to official U.S. Census Bureau data, Marin County has a population of approximately 262,321 residents and spans an area of 520 square miles.
How many ZIP codes operate in Marin County? ▾
There are 21 active USPS ZIP codes serving addresses within Marin County, California.