Population & Demographics
San Mateo, CA
San Mateo is home to 103,105 people. Explore its demographics, housing, and economy — plus how its 54,970 resident workers commute each day.
103,105 residents
Median age 38.3 · U.S. Census Bureau, ACS 5-Year (2024).
San Mateo population & demographics
Who lives in San Mateo — population, age, housing, and income, from the U.S. Census Bureau.
Source: U.S. Census Bureau, American Community Survey (ACS) 2024 5-Year Estimates. Values shown as “—” are suppressed or unavailable for this place.
Race & ethnicity in San Mateo
How San Mateo breaks down by race and ethnicity — each bar is that group’s share of the population, from the U.S. Census Bureau ACS 5-Year (2024).
Race across San Mateo
Each dot is a group of people, placed in their 2020 Census block and colored by race or ethnicity — the pattern shows where groups live across San Mateo.
These figures are for San Mateo proper — the Census place within its city limits — not the surrounding metro area. Metro-wide totals you’ll see elsewhere are larger because they bundle in neighboring cities and suburbs.
How San Mateo commutes
Every dot is a worker moving between home and job. Trace where the area pulls people in from — and where its residents head each day.
54 / 100
How short the typical commute is here, on an absolute 0–100 scale (higher is shorter). How it’s calculated.
San Mateo
54,970 commutes, one dot at a time
San Mateo
Where 54,970 workers commute
Where residents work
Top destinations for people who live in San Mateo, by worker count.
Who commutes in
Top origin places for workers who travel into San Mateo.
Top industries
The sectors that employ San Mateo’s workforce. Each bar is scaled to that sector’s share of all local jobs — the top sectors shown don’t add up to 100%.
Internet options for San Mateo
The biggest home-internet providers in the area — tap any to compare local plans.
FindBetterInternet is a CensusFlow partner site — we link out so you can compare local plans, and CensusFlow’s Census data stays independent. Provider data is from the FCC National Broadband Map (satellite + fixed wireless excluded).