Residential delivery area · California
ZIP Code 94930: Fairfax, CA
ZIP code 94930 uses the postal name Fairfax, California and lies entirely in Marin County (Census 2020 ZIP-county file). About 8,400 people live there (Census Bureau, ACS 2020-2024). Median household income is $145,362 (Census Bureau, ACS 2020-2024). By Census place, 16% of its land lies in Fairfax; 84% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Fairfax · its only residential ZIP
- County
- Marin County
- Census places
- Fairfax
- Neighborhood
- Manor GeoNames
- Metro area
- San Francisco-Oakland-Fremont, CA
- House district
- CA-2 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 14.2 sq mi · 590 people per sq mi
- PO Box ZIPs
- 94978 also use the name Fairfax
Where is ZIP code 94930?
94930 centers on 37.970°, -122.615° and covers 14.2 square miles of land plus 0.4 of water. It borders 7 ZIP codes: 94960, 94957, 94941, 94973, 94904, 94903, 94946.
The map draws ZIP code areas only. For the streets inside 94930, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 94930 compare with the rest of Marin County?
| Measure | 94930 | In Marin County | In CA |
|---|---|---|---|
| People (ACS 2020-2024) | 8,406 | 13th of 29 | 1,037th of 1,802 |
| Median household income | $145k | 8th of 15 | 182nd of 1,189 |
| Median home value | $1.17M | 14th of 20 | 247th of 1,317 |
Its median household income is higher than in 96% of U.S. residential ZIP codes, and it is denser than 74% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 94930?
The 2020 Census counted 8,729 people in 94930; the ACS, which samples households over 2020-2024, estimates 8,406. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 8,406
- 2020 Census count
- 8,729
- Households
- 3,565
- Median age
- 48.2
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 94930?
Of the 8,406 people the ACS estimates in 94930, 17.5% are under 18 and 22.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (81.0%).
- Under 1817.5%
- 18 to 6460.5%
- 65 and older22.0%
- White, not Hispanic81.0%
- Other or two or more7.8%
- Hispanic or Latino6.5%
- Asian, not Hispanic2.9%
- Black, not Hispanic1.8%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 94930 earn?
Median household income is $145,362 (ACS 2020-2024), the 8th highest of the 15 ranked ZIP codes in Marin County.
- Median household income
- $145,362±$31,571
- Income per person
- $81,981
- Below the poverty line
- 11.0%
- Unemployed (of the labor force)
- 10.6%
- Adults 25+ with a bachelor's degree
- 70.7%
- Adjusted gross income per tax return, 2022
- $159,9364,230 returns; wages 60% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 94930?
FHFA's house price index for 94930, built from repeat sales and appraisals of the same homes, rose 52% from 2015 to 2025 and rose 27% from 2020 to 2025, and moved −8.9% in 2025.
- Median home value (owners' estimate)
- $1,170,000
- Median gross rent
- $2,397
- Homes owned by their occupants
- 69.8%
- Housing units
- 3,729
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 94930?
273 business establishments had a location in this ZIP code in 2023, 3 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services56
- Construction43
- Accommodation and food services33
- Retail trade29
- Other services (except public administration)22
- Health care and social assistance17
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 94930?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 94960 | San Anselmo | 16,232 | $185k | 2.8 mi |
| 94957 | Ross | 2,321 | $250k+ | 2.9 mi |
| 94941 | Mill Valley | 32,706 | $210k | 3.2 mi |
| 94973 | Woodacre | 1,689 | $231k | 3.2 mi |
| 94904 | Greenbrae | 12,815 | $169k | 3.8 mi |
| 94903 | San Rafael | 30,615 | $142k | 4.7 mi |
| 94946 | Nicasio | 715 | $155k | 8.5 mi |
| 94963 | San Geronimo | 739 | $211k | 3.8 mi (near) |
| 94970 | Stinson Beach | 255 | $133k | 3.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.
Which other ZIP codes use the name Fairfax?
1 more ZIP code carries the postal name Fairfax, CA without a residential delivery area: PO boxes at the post office, or a single organization with its own ZIP code. The Census Bureau publishes no figures for it.
| ZIP | County |
|---|---|
| 94978 | Marin County |
Source: GeoNames postal codes (CC BY 4.0), downloaded 2026-10-09; a ZIP code with no Census ZCTA has no residential delivery area.