Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/CA/SAN-MATEO

San Mateo ZIP codes, California

San Mateo, CA has 5 ZIP codes (94403, 94404, 94401, 94402 and 94497) and area code 650. The largest is 94403.

USPS city name
5 ZIP codes
Overlapping the city
1 more
Population
103,105
Area code
650

Mail addressed to San Mateo uses the ZIP codes above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

San Mateo in numbers

About 103,105 people live in San Mateo, in 39,895 households. The median household income is $153,504 a year, 55% above the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $1,618,700 (2.2 times the California median), and median gross rent is $3,077 a month. The median age is 38.3; 57.8% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 26 minutes.

Population103,105San Mateo103,105
Households39,895San Mateo39,895
Median age38.3San Mateo38.3California37.9US 38.9
Median household income$153,504San Mateo$153,504California$99,122US $80,734
Median home value$1,618,700San Mateo$1,618,700California$734,700US $332,700
Median gross rent$3,077San Mateo$3,077California$2,036US $1,413
Bachelor's degree or higher57.8%San Mateo57.8%California37.1%US 35.7%
Mean commute26.1 minSan Mateo26.1 minCalifornia28.7 minUS 26.4 min
Population density8,497 / sq miSan Mateo8,497 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place San Mateo city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as San Mateo

ZIP codes with the USPS city name San Mateo
ZIP City Type Population Median income Median home
94403 San Mateo , CA Standard 43,276 $174,917 $1,746,300
94404 San Mateo , CA Standard 35,881 $192,332 $1,714,400
94401 San Mateo , CA Standard 35,295 $122,227 $1,184,500
94402 San Mateo , CA Standard 25,475 $172,522 $2,000,000+
94497 San Mateo , CA No street area — — —

Other ZIP codes overlapping San Mateo

These ZIP codes cover part of San Mateo but are addressed as somewhere else.

ZIP codes overlapping San Mateo
ZIP City Type Population Median income Median home
94010 Burlingame , CA Standard 43,025 $196,882 $2,000,000+

Map of San Mateo ZIP codes

9440394404944019440294497

The ZIP codes of San Mateo, CA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near San Mateo

The nearest larger towns are Hayward (158,801 people, 12 mi), Oakland (439,418 people, 15 mi) and Sunnyvale (154,236 people, 20 mi).

Towns near San Mateo
TownPopulationDistance
Hillsborough 11,099 2.6 mi
Foster City 32,792 3.3 mi
Belmont 27,337 3.3 mi
Burlingame 30,525 3.5 mi
San Carlos 29,614 4.8 mi
Millbrae 22,689 5.7 mi
Redwood City 82,447 6.2 mi
Emerald Lake Hills 4,235 7.0 mi
South San Francisco 64,305 7.5 mi
San Bruno 42,307 8.0 mi
North Fair Oaks 13,100 8.3 mi
Brisbane 4,692 8.9 mi
El Granada 5,232 9.0 mi
Atherton 6,993 9.3 mi

More nearby: every ZIP code in San Mateo County · California ZIP codes

Cite this page

zipcodes.pro. “San Mateo, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/san-mateo

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