Marin County, California ZIP codes
42 ZIP codes are in Marin County. It's part of the San Francisco-Oakland-Fremont, CA metro area.
- ZIP codes
- 42
- Population in these ZIPs
- 290,846
- Avg. median income
- $152,300population-weighted
- Cities & towns
- 27
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Marin County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 94901 | San Rafael | 41,307 | $115,330 | $1,394,200 |
| 94903 | San Rafael | 30,615 | $142,083 | $1,250,100 |
| 94904 | Greenbrae | 12,815 | $169,118 | $2,308,400 |
| 94912 PO Box | San Rafael | — | — | — |
| 94913 PO Box | San Rafael | — | — | — |
| 94914 PO Box | Kentfield | — | — | — |
| 94915 PO Box | San Rafael | — | — | — |
| 94920 | Belvedere Tiburon | 12,609 | $246,045 | $3,404,700 |
| 94924 | Bolinas | 1,372 | $101,458 | $1,954,600 |
| 94925 | Corte Madera | 10,077 | $232,763 | $1,871,900 |
| 94929 | Dillon Beach | 293 | $209,536 | $1,360,000 |
| 94930 | Fairfax | 8,406 | $145,362 | $1,233,100 |
| 94933 | Forest Knolls | 1,033 | $133,006 | $863,900 |
| 94937 | Inverness | 1,009 | $78,281 | $1,463,400 |
| 94938 | Lagunitas | 437 | — | $1,044,600 |
| 94939 | Larkspur | 7,315 | $203,988 | $2,210,700 |
| 94940 | Marshall | 148 | $47,021 | $1,537,100 |
| 94941 | Mill Valley | 32,706 | $209,870 | $2,181,400 |
| 94942 PO Box | Mill Valley | — | — | — |
| 94945 | Novato | 17,635 | $107,790 | $1,063,200 |
| 94946 | Nicasio | 715 | $154,688 | $2,119,000 |
| 94947 | Novato | 24,100 | $128,766 | $1,012,800 |
| 94948 PO Box | Novato | — | — | — |
| 94949 | Novato | 17,787 | $120,758 | $1,207,500 |
| 94950 | Olema | 22 | — | — |
| 94952 | Petaluma | 33,785 | $117,343 | $1,058,200 |
| 94956 | Point Reyes Station | 1,080 | $82,205 | $1,542,500 |
| 94957 | Ross | 2,321 | $250,001 | $4,347,400 |
| 94960 | San Anselmo | 16,232 | $185,170 | $1,702,800 |
| 94963 | San Geronimo | 739 | $210,823 | $1,272,200 |
| 94964 | San Quentin | 2,344 | $115,192 | — |
| 94965 | Sausalito | 11,724 | $146,946 | $1,591,400 |
| 94966 PO Box | Sausalito | — | — | — |
| 94970 | Stinson Beach | 255 | $132,857 | $3,577,400 |
| 94971 | Tomales | 276 | $119,028 | $1,093,400 |
| 94973 | Woodacre | 1,689 | $231,094 | $1,116,600 |
| 94974 PO Box | San Quentin | — | — | — |
| 94976 PO Box | Corte Madera | — | — | — |
| 94977 PO Box | Larkspur | — | — | — |
| 94978 PO Box | Fairfax | — | — | — |
| 94979 PO Box | San Anselmo | — | — | — |
| 94998 PO Box | Novato | — | — | — |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Marin County
Nearby counties
Frequently asked questions
How many ZIP codes are in Marin County, California?
42 ZIP codes are mainly in Marin County.
What cities are in Marin County?
ZIP codes in Marin County use the city names Belvedere Tiburon, Bolinas, Corte Madera, Dillon Beach, Fairfax, Forest Knolls, Greenbrae, Inverness, Kentfield, Lagunitas, Larkspur and Marshall and others.
What metro area is Marin County in?
Marin County is part of the San Francisco-Oakland-Fremont, CA metropolitan statistical area.