San Mateo Population 2026
San Mateo has a population of 103,536, making it the #310 biggest city in 🇺🇸 United States, located in California. It is about 85× smaller than New York City, the country's biggest city.
Population (city proper)
103,536
Rank in United States
#310
Coordinates
37.56°N, 122.33°W
~13 m elevation · America/Los_Angeles
Distance to capital (Washington)
3,918 km
2,433 miles, straight line
Other big cities in California
| City | Population | Rank in United States |
|---|---|---|
| Los Angeles | 3,820,914 | #2 |
| San Diego | 1,404,452 | #8 |
| San Jose | 997,368 | #12 |
| San Francisco | 827,526 | #17 |
| Fresno | 542,107 | #34 |
| Sacramento | 524,943 | #35 |
| Long Beach | 474,140 | #41 |
| Oakland | 419,267 | #45 |
Cities near San Mateo
- San Bruno43,185 people · ~11 km away
- Redwood City85,288 people · ~12 km away
- South San Francisco67,271 people · ~13 km away
- Bayview-Hunters Point34,835 people · ~19 km away
- Daly City106,562 people · ~20 km away
- San Leandro90,712 people · ~23 km away
FAQ
What is the population of San Mateo?
San Mateo has a population of 103,536 (city proper, latest official figure via GeoNames), making it the #310 biggest city in United States.
What state is San Mateo in?
San Mateo is located in California, United States.
Is San Mateo the capital of United States?
No, the capital of United States is Washington D.C., about 3,918 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.
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