Residential delivery area · California
ZIP Code 94904: Kentfield (Greenbrae), CA
ZIP code 94904 is in Kentfield (postal name Greenbrae), California, entirely in Marin County (Census 2020 ZIP-county file). About 13,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $169,118 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Kentfield (55%) and Larkspur (15%), and under 1% in smaller places; 28% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2022
- ZBP2023
- IRS2022
- Town
- Greenbrae · its only residential ZIP
- County
- Marin County
- Census places
- Kentfield (55%) census-designated place; Larkspur (15%)
- Metro area
- San Francisco-Oakland-Fremont, CA
- House district
- CA-2 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 4.9 sq mi · 2,590 people per sq mi
Where is ZIP code 94904?
94904 centers on 37.947°, -122.552° and covers 4.9 square miles of land plus 0.1 of water. It borders 6 ZIP codes: 94939, 94957, 94925, 94941, 94901, 94930.
The map draws ZIP code areas only. For the streets inside 94904, 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).
How does 94904 compare with the rest of Marin County?
| Measure | 94904 | In Marin County | In CA |
|---|---|---|---|
| People (ACS 2020-2024) | 12,815 | 9th of 29 | 947th of 1,802 |
| Median household income | $169k | 6th of 15 | 103rd of 1,189 |
| Median home value | $2M+ | 1= of 20 | 1= of 1,317 |
1= means a shared first place: 94904's median home value ties with 5 other ZIP codes at the Census cap in Marin County; median home value ties with 61 other ZIP codes at the Census cap in California.
Its median household income is higher than in 98% of U.S. residential ZIP codes, and it is denser than 87% 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 94904?
The 2020 Census counted 12,718 people in 94904; the ACS, which samples households over 2020-2024, estimates 12,815. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 12,815
- 2020 Census count
- 12,718
- Households
- 5,558
- Median age
- 50.9
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 94904?
Of the 12,815 people the ACS estimates in 94904, 18.8% are under 18 and 27.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (76.3%).
- Under 1818.8%
- 18 to 6453.7%
- 65 and older27.5%
- White, not Hispanic76.3%
- Hispanic or Latino8.5%
- Other or two or more8.1%
- Asian, not Hispanic6.6%
- Black, not Hispanic0.4%
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 94904 earn?
Median household income is $169,118 (ACS 2020-2024), the 6th highest of the 15 ranked ZIP codes in Marin County.
- Median household income
- $169,118±$23,868
- Income per person
- $131,960
- Below the poverty line
- 5.2%
- Unemployed (of the labor force)
- 4.7%
- Adults 25+ with a bachelor's degree
- 73.5%
- Adjusted gross income per tax return, 2022
- $427,1826,040 returns; wages 44% 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 94904?
- Median home value (owners' estimate)
- $2,000,000 or more
- Median gross rent
- $2,712
- Homes owned by their occupants
- 62.8%
- Housing units
- 5,975
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 94904?
472 business establishments had a location in this ZIP code in 2023, 39 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance130
- Professional, scientific, and technical services95
- Real estate and rental and leasing45
- Construction34
- Retail trade33
- Finance and insurance30
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 94904?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 94939 | Larkspur | 7,315 | $204k | 1.1 mi |
| 94957 | Ross | 2,321 | $250k+ | 1.2 mi |
| 94925 | Corte Madera | 10,077 | $233k | 2.6 mi |
| 94941 | Mill Valley | 32,706 | $210k | 3.1 mi |
| 94901 | San Rafael | 41,307 | $115k | 3.6 mi |
| 94930 | Fairfax | 8,406 | $145k | 3.8 mi |
| 94964 | San Quentin | 2,344 | $115k | 3.4 mi (near) |
| 94960 | San Anselmo | 16,232 | $185k | 3.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.