Residential delivery area · California
ZIP Code 94404: San Mateo, CA
ZIP code 94404 uses the postal name San Mateo, California and lies entirely in San Mateo County (Census 2020 ZIP-county file). About 36,000 people live there (Census Bureau, ACS 2020-2024), the 2nd most populous of San Mateo's 4 residential ZIP codes. Median household income is $192,332 (Census Bureau, ACS 2020-2024). Most of its land (87%) lies in the city of Foster City; 13% is in San Mateo.
- ACS2020-24
- Census2020
- FHFA2022
- ZBP2023
- IRS2022
- Town
- San Mateo · 4 residential ZIPs
- County
- San Mateo County
- Census places
- Foster City (87%); San Mateo (13%)
- Metro area
- San Francisco-Oakland-Fremont, CA
- House district
- CA-15 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 4.4 sq mi · 8,249 people per sq mi
- PO Box ZIPs
- 94497 also use the name San Mateo
Where is ZIP code 94404?
94404 centers on 37.556°, -122.268° and covers 4.4 square miles of land plus 0.6 of water. It borders 4 ZIP codes: 94065, 94403, 94401, 94002.
The map draws ZIP code areas only. For the streets inside 94404, 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 94404 compare with the rest of San Mateo?
| Measure | 94404 | In San Mateo | In San Mateo County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 35,881 | 2nd of 4 | 11th of 31 | 467th of 1,802 |
| Median household income | $192k | 1st of 4 | 10th of 23 | 62nd of 1,189 |
| Median home value | $1.71M | 3rd of 4 | 14th of 27 | 95th of 1,317 |
Its median household income is higher than in 99% of U.S. residential ZIP codes, and it is denser than 97% 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 94404?
The 2020 Census counted 37,323 people in 94404; the ACS, which samples households over 2020-2024, estimates 35,881. Between the 2010 and 2020 censuses its population grew 10.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 35,881
- 2020 Census count
- 37,323+10.6% since 2010 (33,749)
- Households
- 14,717
- Median age
- 39.8
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 94404?
Of the 35,881 people the ACS estimates in 94404, 21.3% are under 18 and 17.8% are 65 or older. The largest group by race and Hispanic origin is Asian (not Hispanic) (52.6%), then White (not Hispanic) (30.3%).
- Under 1821.3%
- 18 to 6460.9%
- 65 and older17.8%
- Asian, not Hispanic52.6%
- White, not Hispanic30.3%
- Other or two or more7.9%
- Hispanic or Latino7.4%
- Black, not Hispanic1.9%
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 94404 earn?
Median household income is $192,332 (ACS 2020-2024), the 10th highest of the 23 ranked ZIP codes in San Mateo County. It is not measurably different from 2015-2019 ($183,847 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $192,332
- Income per person
- $99,796
- Below the poverty line
- 4.3%
- Unemployed (of the labor force)
- 4.6%
- Adults 25+ with a bachelor's degree
- 74.3%
- Adjusted gross income per tax return, 2022
- $224,17617,540 returns; wages 77% 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 94404?
- Median home value (owners' estimate)
- $1,714,400
- Median gross rent
- $3,500 or more
- Homes owned by their occupants
- 51.2%
- Housing units
- 15,350
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 94404?
911 business establishments had a location in this ZIP code in 2023, 1 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services193
- Health care and social assistance119
- Accommodation and food services92
- Real estate and rental and leasing87
- Finance and insurance78
- Other services (except public administration)54
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 94404?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 94065 | Redwood City | 11,673 | $216k | 1.8 mi |
| 94403 | San Mateo | 43,276 | $175k | 2.4 mi |
| 94401 | San Mateo | 35,295 | $122k | 3.2 mi |
| 94002 | Belmont | 27,534 | $204k | 3.3 mi |
| 94402 | San Mateo | 25,475 | $173k | 3.6 mi (near) |
| 94070 | San Carlos | 30,447 | $240k | 4.1 mi (near) |
| 94063 | Redwood City | 34,433 | $117k | 5.9 mi (near) |
| 94010 | Burlingame | 43,025 | $197k | 6.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.