Population & Demographics
San Marcos, CA
San Marcos is home to 94,882 people. Explore its demographics, housing, and economy — plus how its 44,791 resident workers commute each day.
94,882 residents
Median age 36.8 · U.S. Census Bureau, ACS 5-Year (2024).
San Marcos population & demographics
Who lives in San Marcos — 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 Marcos
How San Marcos 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 Marcos
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 Marcos.
These figures are for San Marcos 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 Marcos 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.
53 / 100
How short the typical commute is here, on an absolute 0–100 scale (higher is shorter). How it’s calculated.
San Marcos
44,791 commutes, one dot at a time
San Marcos
Where 44,791 workers commute
Where residents work
Top destinations for people who live in San Marcos, by worker count.
Who commutes in
Top origin places for workers who travel into San Marcos.
Top industries
The sectors that employ San Marcos’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 Marcos
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).