gimmedastats
Wednesday, September 2, 2026
Population
103,337
US Census estimate, July 2025
Median home value
$1,618,700
Owner-occupied units

San Mateo, CA

California · 37.560° N, 122.311° W · 12 sq mi

San Mateo is a city in California, with a population of 103,337 and about 8,528 residents per square mile. The median household earns $153,504 a year, and the median home is worth $1,618,700.

Conditions

Humidity & wind
—
UV index
—
Sunrise & sunset
—
Local time
—
Forgotten Flicks movie T-shirts on TeePublic

Size & density

Land area
12 sq mi
Water excluded
Population density
8,528
People per square mile
Rank by population
#338
Of cities on this site
Rank by area
#784
Of cities on this site

Money & housing

Median household income
$153,504
US median ≈ $78,538
Median gross rent
$3,077
Per month
Homeownership
49.9%
US ≈ 65%
Average commute
26.1 min
One way

People

Median age
38.3
US median 39.1
Bachelor's degree +
57.8%
Age 25 and over
Foreign born
36.2%
Households
39,895
2.54 people each

Climate · 2021–2025 average

Clear days 49/yr Mostly or fully clear sky
Days with rain 72/yr 0.01 in or more
Days with snow 1/yr
Days above 90° 1/yr
Below freezing 0/yr
Annual rainfall 22.6in Inches per year, scaled to 70 in — the rows above count days
Warmest month
September
Average high 73°F
Coldest month
January
Average low 46°F

What people here do for work

Professional & business services 26%
Education & health care 19.7%
Retail trade 8.8%
Manufacturing 7.3%

Top four industries · share of all workers · ACS 2024

Wealthiest person in California

Name
Mark Zuckerberg
Forbes, Apr 2025
Net worth
$189B
As of 25 Apr 2025 — not live
Lives in
Palo Alto
Source of wealth
Meta

Compiled from public reporting, not from an official dataset, and not independently verified.

Largest employer in California · private sector

Employer
University of California
Sector
Education

Compiled from public reporting, not from an official dataset, and not independently verified. Government employers are excluded.

Largest public company in California

Company
Apple
Revenue
$391.0B
Fiscal year 2024
Headquarters
Cupertino
Ticker
AAPL

Compiled from public reporting, not from an official dataset, and not independently verified.

State of California

State bird
California Quail
State flower
California Poppy
State capital
Sacramento
Nickname
The Golden State

Compare San Mateo with

Cities near San Mateo

Cities about the same size

More in California

All California cities →