Residential delivery area · California
ZIP Code 94939: Larkspur, CA
ZIP code 94939 is in Larkspur, California, entirely in Marin County (Census 2020 ZIP-county file). About 7,300 people live there (Census Bureau, ACS 2020-2024). Median household income is $203,988 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Larkspur (87%) and Kentfield (12%), and under 1% in smaller places.
- ACS2020-24
- Census2020
- FHFA2021
- ZBP2023
- IRS2022
- Town
- Larkspur · its only residential ZIP
- County
- Marin County
- Census places
- Larkspur (87%); Kentfield (12%) census-designated place
- Metro area
- San Francisco-Oakland-Fremont, CA
- House district
- CA-2 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 2.4 sq mi · 3,100 people per sq mi
- PO Box ZIPs
- 94977 also use the name Larkspur
Where is ZIP code 94939?
94939 centers on 37.938°, -122.536° and covers 2.4 square miles of land plus 0.2 of water. It borders 5 ZIP codes: 94904, 94925, 94964, 94901, 94941.
The map draws ZIP code areas only. For the streets inside 94939, 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 94939 compare with the rest of Marin County?
| Measure | 94939 | In Marin County | In CA |
|---|---|---|---|
| People (ACS 2020-2024) | 7,315 | 14th of 29 | 1,065th of 1,802 |
| Median household income | $204k | not ranked | not ranked |
| Median home value | $2M+ | 1= of 20 | 1= of 1,317 |
94939's median household income is not ranked: its 90% margin of error (±$51,618) is more than a quarter of the figure ($203,988). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
1= means a shared first place: 94939'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.
It is denser than 89% of 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 94939?
The 2020 Census counted 7,465 people in 94939; the ACS, which samples households over 2020-2024, estimates 7,315. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 7,315
- 2020 Census count
- 7,465
- Households
- 3,323
- Median age
- 48.4
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 94939?
Of the 7,315 people the ACS estimates in 94939, 18.8% are under 18 and 21.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (75.4%), then Other or two or more (11.1%).
- Under 1818.8%
- 18 to 6459.7%
- 65 and older21.5%
- White, not Hispanic75.4%
- Other or two or more11.1%
- Hispanic or Latino8.4%
- Asian, not Hispanic5.0%
- Black, not Hispanic0.2%
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 94939 earn?
Median household income is $203,988 (ACS 2020-2024).
- Median household income
- $203,988±$51,618
- Income per person
- $114,426
- Below the poverty line
- 6.8%
- Unemployed (of the labor force)
- 4.4%
- Adults 25+ with a bachelor's degree
- 70.7%
- Adjusted gross income per tax return, 2022
- $337,4403,570 returns; wages 51% 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 94939?
- Median home value (owners' estimate)
- $2,000,000 or more
- Median gross rent
- $3,278
- Homes owned by their occupants
- 49.8%
- Housing units
- 3,676
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 94939?
404 business establishments had a location in this ZIP code in 2023, 17 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services79
- Finance and insurance61
- Real estate and rental and leasing46
- Health care and social assistance39
- Retail trade35
- Accommodation and food services35
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 94939?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 94904 | Greenbrae | 12,815 | $169k | 1.1 mi |
| 94925 | Corte Madera | 10,077 | $233k | 1.6 mi |
| 94964 | San Quentin | 2,344 | $115k | 2.5 mi |
| 94901 | San Rafael | 41,307 | $115k | 3.5 mi |
| 94941 | Mill Valley | 32,706 | $210k | 3.6 mi |
| 94957 | Ross | 2,321 | $250k+ | 2.2 mi (near) |
| 94960 | San Anselmo | 16,232 | $185k | 4.7 mi (near) |
| 94930 | Fairfax | 8,406 | $145k | 4.8 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 Larkspur?
1 more ZIP code carries the postal name Larkspur, 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 |
|---|---|
| 94977 | 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.