San Bruno, California demographics

San Bruno, CA demographics: median age 39.8; 45.2% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · San Bruno city, California · Incorporated city · GEOID 0665028. The survey estimates a population of 42,307 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in San Bruno is 39.8 years, with a 90% margin of error of 1.1 years. There are 15,224 households (±591). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	39.8 ±1.1	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 42,307
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	7,167 ±712	16.9% ±1.7 pp	22.0%	22.0%
18–34	9,881 ±799	23.4% ±1.9 pp	23.9%	22.8%
35–64	17,663 ±1,096	41.7% ±2.6 pp	38.5%	38.0%
65 and older	7,596 ±631	18.0% ±1.5 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 42,307
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	21,030 ±725	49.7% ±1.7 pp	49.9%	49.5%
Female	21,277 ±731	50.3% ±1.7 pp	50.1%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 42,307
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	14,057 ±1,207	33.2% ±2.9 pp	39.7%	61.0%
Black or African American alone	956 ±686 · low precision	2.3% ±1.6 pp · low precision	5.4%	12.2%
American Indian and Alaska Native alone	185 ±139 · low precision	0.4% ±0.3 pp · low precision	1.3%	0.9%
Asian alone	13,429 ±1,021	31.7% ±2.4 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	1,109 ±701 · low precision	2.6% ±1.7 pp · low precision	0.4%	0.2%
Some other race alone	5,887 ±1,181	13.9% ±2.8 pp	18.5%	7.1%
Two or more races	6,684 ±1,012	15.8% ±2.4 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 42,307
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	29,953 ±1,399	70.8% ±3.3 pp	59.8%	80.7%
Hispanic or Latino	12,354 ±1,391	29.2% ±3.3 pp	40.2%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 15,224
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	7,678 ±466	50.4% ±2.4 pp	48.4%	46.9%
Other family: male householder, no spouse present	690 ±204	4.5% ±1.3 pp	6.3%	5.1%
Other family: female householder, no spouse present	1,481 ±280	9.7% ±1.8 pp	13.1%	12.2%
Nonfamily: householder living alone	3,905 ±514	25.7% ±3.2 pp	24.3%	28.7%
Nonfamily: householder not living alone	1,470 ±318	9.7% ±2.1 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 15,224
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	4,032 ±379	26.5% ±2.3 pp	32.4%	29.5%
Households without people under 18	11,192 ±652	73.5% ±3.2 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 15,224
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	3,905 ±514	25.7% ±3.2 pp	24.3%	28.7%
Two-person households	4,921 ±473	32.3% ±2.8 pp	30.5%	33.8%
Three-person households	2,483 ±340	16.3% ±2.1 pp	16.7%	15.3%
Four-person households	2,221 ±341	14.6% ±2.2 pp	14.9%	12.6%
Five-person households	894 ±195	5.9% ±1.3 pp	7.7%	5.9%
Six-person households	600 ±200	3.9% ±1.3 pp	3.3%	2.2%
Seven or more people	200 ±93	1.3% ±0.6 pp	2.6%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 42,307
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	27,104 ±1,083	64.1% ±2.6 pp	73.0%	85.9%
Foreign born	15,203 ±1,075	35.9% ±2.5 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 40,365
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	21,928 ±1,177	54.3% ±2.9 pp	55.6%	77.7%
Spanish	7,490 ±1,231	18.6% ±3.0 pp	28.3%	13.6%
French, Haitian, or Cajun	126 ±69 · low precision	0.3% ±0.2 pp · low precision	0.4%	0.7%
German or other West Germanic	167 ±114 · low precision	0.4% ±0.3 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	459 ±217	1.1% ±0.5 pp	0.7%	0.7%
Other Indo-European	1,448 ±488	3.6% ±1.2 pp	3.5%	2.0%
Korean	338 ±220 · low precision	0.8% ±0.5 pp · low precision	1.0%	0.3%
Chinese, including Mandarin and Cantonese	3,611 ±629	8.9% ±1.6 pp	3.5%	1.1%
Vietnamese	66 ±48 · low precision	0.2% ±0.1 pp · low precision	1.5%	0.5%
Tagalog, including Filipino	2,543 ±528	6.3% ±1.3 pp	2.1%	0.6%
Other Asian and Pacific Island	1,646 ±517	4.1% ±1.3 pp	2.0%	1.1%
Arabic	384 ±262 · low precision	1.0% ±0.6 pp · low precision	0.6%	0.5%
Other and unspecified	159 ±160 · low precision	0.4% ±0.4 pp · low precision	0.6%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 31,807
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	2,919 ±697	9.2% ±2.2 pp	15.3%	10.4%
High school graduate or equivalency	6,710 ±641	21.1% ±2.0 pp	20.5%	26.0%
Some college, no degree	5,312 ±593	16.7% ±1.8 pp	19.3%	19.1%
Associate’s degree	2,474 ±341	7.8% ±1.1 pp	7.9%	8.8%
Bachelor’s degree	9,686 ±749	30.5% ±2.2 pp	22.7%	21.6%
Graduate or professional degree	4,706 ±494	14.8% ±1.5 pp	14.4%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 41,934
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	37,770 ±673	90.1% ±1.6 pp	89.2%	87.7%
Moved within same county	2,013 ±491	4.8% ±1.2 pp	6.4%	6.3%
Moved from a different county in the same state	1,614 ±471	3.8% ±1.1 pp	2.6%	3.1%
Moved from a different state	297 ±148	0.7% ±0.4 pp	1.1%	2.3%
Moved from abroad	240 ±143 · low precision	0.6% ±0.3 pp · low precision	0.7%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

4.9% of San Bruno residents (±1.4 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 94.6% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	San Bruno	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	4.9% ±1.4 pp	6.6%	8.4%	Lower
Households with a broadband subscription Households	94.6% ±1.0 pp	93.5%	91.0%	Higher
Veterans Civilian population age 18 and older	3.3% ±0.8 pp	4.3%	6.2%	Lower

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for San Bruno . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read San Bruno housing and cost context or return to the city profile.