ZIP code · San Geronimo · California · United States
ZIP code 94963 — San Geronimo
ZIP code 94963 serves San Geronimo, California.
- Postal code
- 94963Single source Value from one source, not cross-checked.
- City
- San Geronimo
- County
- Marin FIPS 06041
- State
- California
- Country
- United States
- Coordinates
- 38.0133, -122.6639 — precision precise (locality)
View on OpenStreetMap - Population
- 562 (ZCTA, ACS 5-year)
- Population density
- 352 / sq mi
- Land area
- 1.6 sq mi (4.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $206,375
- Per-capita income
- $104,829
- Median age
- 46.4
- Households
- 195
- Housing units
- 195
- Median home value
- $1,220,800
- Congressional district
- CA-2 (119th Congress)
- USDA hardiness zone
- 9b (25 to 30 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
- Area code
- 559Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 94963 with another ZIP · ZIPs within 25 miles · distance from 94963
Map of ZIP code 94963
Climate — monthly normals
Warmest month Aug (avg high 81°F), coldest Dec (avg low 42°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 57 | 61 | 65 | 68 | 72 | 78 | 81 | 81 | 81 | 75 | 65 | 57 |
| Avg low °F | 43 | 44 | 46 | 48 | 51 | 54 | 55 | 56 | 54 | 51 | 46 | 42 |
| Precip in | 7.1 | 6.9 | 4.4 | 2.0 | 0.9 | 0.1 | 0.0 | 0.1 | 0.1 | 1.5 | 3.5 | 7.8 |
NOAA 1991–2020 climate normals from the nearest station: SAN RAFAEL CIVIC CTR (7.0 mi) · NOAA NCEI
Places in ZIP 94963
- 1 schools
- 2 parks
- 2 post offices
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page