Residential delivery area · California
ZIP Code 94402: San Mateo, CA
ZIP code 94402 is in San Mateo, California, entirely in San Mateo County (Census 2020 ZIP-county file). About 25,000 people live there (Census Bureau, ACS 2020-2024), the least populous of San Mateo's 4 residential ZIP codes. Median household income is $172,522 (Census Bureau, ACS 2020-2024). By Census place, its land lies in San Mateo (60%), Highlands (26%) and Baywood Park (11%); 4% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2023
- ZBP2023
- IRS2022
- Town
- San Mateo · 4 residential ZIPs
- County
- San Mateo County
- Census places
- San Mateo (60%); Highlands (26%) census-designated place; Baywood Park (11%) census-designated place
- Neighborhoods
- Hayward Park, San Mateo Park GeoNames
- Metro area
- San Francisco-Oakland-Fremont, CA
- House districts
- CA-15 (97%), CA-16 (3%) 119th Congress, by share of land
- State
- California
- Time zone
- Pacific
- Land area
- 5.1 sq mi · 5,045 people per sq mi
- PO Box ZIPs
- 94497 also use the name San Mateo
Where is ZIP code 94402?
94402 centers on 37.540°, -122.330° and covers 5.1 square miles of land. It borders 5 ZIP codes: 94403, 94401, 94002, 94010, 94062.
The map draws ZIP code areas only. For the streets inside 94402, 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 94402 compare with the rest of San Mateo?
| Measure | 94402 | In San Mateo | In San Mateo County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 25,475 | 4th of 4 | 17th of 31 | 716th of 1,802 |
| Median household income | $173k | 3rd of 4 | 12th of 23 | 99th of 1,189 |
| Median home value | $2M+ | 1st of 4 | 1= of 27 | 1= of 1,317 |
1= means a shared first place: 94402's median home value ties with 7 other ZIP codes at the Census cap in San Mateo 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 94% 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 94402?
The 2020 Census counted 25,879 people in 94402; the ACS, which samples households over 2020-2024, estimates 25,475. Between the 2010 and 2020 censuses its population grew 7.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 25,475
- 2020 Census count
- 25,879+7.9% since 2010 (23,981)
- Households
- 10,125
- Median age
- 40.8
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 94402?
Of the 25,475 people the ACS estimates in 94402, 21.9% are under 18 and 19.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (46.5%), then Asian (not Hispanic) (28.1%).
- Under 1821.9%
- 18 to 6458.2%
- 65 and older19.9%
- White, not Hispanic46.5%
- Asian, not Hispanic28.1%
- Hispanic or Latino15.7%
- Other or two or more8.6%
- Black, not Hispanic1.1%
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 94402 earn?
Median household income is $172,522 (ACS 2020-2024), the 12th highest of the 23 ranked ZIP codes in San Mateo County. It fell from $207,467 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $172,522±$19,726
- Income per person
- $109,498
- Below the poverty line
- 5.2%
- Unemployed (of the labor force)
- 4.0%
- Adults 25+ with a bachelor's degree
- 68.6%
- Adjusted gross income per tax return, 2022
- $343,59613,370 returns; wages 61% 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 94402?
- Median home value (owners' estimate)
- $2,000,000 or more
- Median gross rent
- $3,500 or more
- Homes owned by their occupants
- 58.4%
- Housing units
- 10,764
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 94402?
1,024 business establishments had a location in this ZIP code in 2023, 18 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services263
- Health care and social assistance119
- Finance and insurance102
- Construction79
- Other services (except public administration)76
- Information64
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 94402?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 94403 | San Mateo | 43,276 | $175k | 1.4 mi |
| 94401 | San Mateo | 35,295 | $122k | 2.5 mi |
| 94002 | Belmont | 27,534 | $204k | 2.6 mi |
| 94010 | Burlingame | 43,025 | $197k | 3.3 mi |
| 94062 | Redwood City | 25,759 | $233k | 8.5 mi |
| 94404 | San Mateo | 35,881 | $192k | 3.6 mi (near) |
| 94070 | San Carlos | 30,447 | $240k | 4.4 mi (near) |
| 94065 | Redwood City | 11,673 | $216k | 4.4 mi (near) |
| 94030 | Millbrae | 22,689 | $164k | 5.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.