San Quentin, CA ZIP codes
San Quentin, California has 2 ZIP codes, including 1 PO Box ZIP. They are in Marin County.
- Population in these ZIPs
- 2,344
- Avg. median income
- $115,200population-weighted
- Typical home value
- —population-weighted
- Metro area
- San Francisco-Oakland-Fremont, CA
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San Quentin, CA ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 94964 | Marin County | 2,344 | $115,192 | — |
| 94974 PO Box | Marin County | — | — | — |
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 near San Quentin
- Corte Madera 2 mi
- Larkspur 3 mi
- Greenbrae 4 mi
- Belvedere Tiburon 4 mi
- Ross 4 mi
- Mill Valley 5 mi
- San Rafael 5 mi
- San Anselmo 5 mi
- Sausalito 6 mi
- Fairfax 7 mi
- Richmond 8 mi
- San Pablo 9 mi
Frequently asked questions
What county is San Quentin, California in?
San Quentin ZIP codes are in Marin County.
Which San Quentin ZIP codes are PO Boxes?
94974 is a PO Box or single-organization ZIP code; it has no residential delivery area.