Brentwood, California demographics

Brentwood, CA demographics: median age 40.2; 39.3% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Brentwood city, California · Incorporated city · GEOID 0608142. The survey estimates a population of 65,208 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Brentwood is 40.2 years, with a 90% margin of error of 1.0 years. There are 21,295 households (±539). 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	40.2 ±1.0	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 65,208
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	17,144 ±1,212	26.3% ±1.9 pp	22.0%	22.0%
18–34	11,543 ±1,018	17.7% ±1.6 pp	23.9%	22.8%
35–64	26,198 ±1,429	40.2% ±2.2 pp	38.5%	38.0%
65 and older	10,323 ±724	15.8% ±1.1 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 65,208
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	31,464 ±959	48.3% ±1.5 pp	49.9%	49.5%
Female	33,744 ±965	51.7% ±1.5 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: 65,208
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	30,016 ±1,698	46.0% ±2.6 pp	39.7%	61.0%
Black or African American alone	5,547 ±1,310	8.5% ±2.0 pp	5.4%	12.2%
American Indian and Alaska Native alone	316 ±193 · low precision	0.5% ±0.3 pp · low precision	1.3%	0.9%
Asian alone	10,252 ±1,234	15.7% ±1.9 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	159 ±135 · low precision	0.2% ±0.2 pp · low precision	0.4%	0.2%
Some other race alone	7,522 ±1,273	11.5% ±2.0 pp	18.5%	7.1%
Two or more races	11,396 ±1,833	17.5% ±2.8 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 65,208
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	47,508 ±1,611	72.9% ±2.5 pp	59.8%	80.7%
Hispanic or Latino	17,700 ±1,606	27.1% ±2.5 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: 21,295
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	14,014 ±614	65.8% ±2.4 pp	48.4%	46.9%
Other family: male householder, no spouse present	807 ±257	3.8% ±1.2 pp	6.3%	5.1%
Other family: female householder, no spouse present	2,245 ±368	10.5% ±1.7 pp	13.1%	12.2%
Nonfamily: householder living alone	3,433 ±437	16.1% ±2.0 pp	24.3%	28.7%
Nonfamily: householder not living alone	796 ±336	3.7% ±1.6 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 21,295
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	9,350 ±441	43.9% ±1.7 pp	32.4%	29.5%
Households without people under 18	11,945 ±681	56.1% ±2.9 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 21,295
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	3,433 ±437	16.1% ±2.0 pp	24.3%	28.7%
Two-person households	6,165 ±622	29.0% ±2.8 pp	30.5%	33.8%
Three-person households	4,213 ±621	19.8% ±2.9 pp	16.7%	15.3%
Four-person households	4,017 ±559	18.9% ±2.6 pp	14.9%	12.6%
Five-person households	2,182 ±410	10.2% ±1.9 pp	7.7%	5.9%
Six-person households	899 ±252	4.2% ±1.2 pp	3.3%	2.2%
Seven or more people	386 ±148	1.8% ±0.7 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: 65,208
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	52,629 ±1,229	80.7% ±1.9 pp	73.0%	85.9%
Foreign born	12,579 ±1,231	19.3% ±1.9 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 61,796
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	43,092 ±1,968	69.7% ±3.1 pp	55.6%	77.7%
Spanish	8,730 ±1,575	14.1% ±2.5 pp	28.3%	13.6%
French, Haitian, or Cajun	200 ±153 · low precision	0.3% ±0.2 pp · low precision	0.4%	0.7%
German or other West Germanic	213 ±131 · low precision	0.3% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	399 ±222 · low precision	0.6% ±0.4 pp · low precision	0.7%	0.7%
Other Indo-European	3,020 ±678	4.9% ±1.1 pp	3.5%	2.0%
Korean	376 ±327 · low precision	0.6% ±0.5 pp · low precision	1.0%	0.3%
Chinese, including Mandarin and Cantonese	1,371 ±498	2.2% ±0.8 pp	3.5%	1.1%
Vietnamese	195 ±132 · low precision	0.3% ±0.2 pp · low precision	1.5%	0.5%
Tagalog, including Filipino	1,851 ±449	3.0% ±0.7 pp	2.1%	0.6%
Other Asian and Pacific Island	1,241 ±440	2.0% ±0.7 pp	2.0%	1.1%
Arabic	431 ±357 · low precision	0.7% ±0.6 pp · low precision	0.6%	0.5%
Other and unspecified	677 ±681 · low precision	1.1% ±1.1 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: 42,517
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	3,510 ±611	8.3% ±1.4 pp	15.3%	10.4%
High school graduate or equivalency	8,492 ±888	20.0% ±2.1 pp	20.5%	26.0%
Some college, no degree	9,677 ±859	22.8% ±2.0 pp	19.3%	19.1%
Associate’s degree	4,124 ±558	9.7% ±1.3 pp	7.9%	8.8%
Bachelor’s degree	11,229 ±850	26.4% ±1.9 pp	22.7%	21.6%
Graduate or professional degree	5,485 ±618	12.9% ±1.4 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: 64,648
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	58,819 ±987	91.0% ±1.5 pp	89.2%	87.7%
Moved within same county	3,445 ±951	5.3% ±1.5 pp	6.4%	6.3%
Moved from a different county in the same state	1,619 ±513	2.5% ±0.8 pp	2.6%	3.1%
Moved from a different state	488 ±226	0.8% ±0.3 pp	1.1%	2.3%
Moved from abroad	277 ±177 · low precision	0.4% ±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

2.1% of Brentwood residents (±0.6 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 96.6% 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	Brentwood	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	2.1% ±0.6 pp	6.6%	8.4%	Lower
Households with a broadband subscription Households	96.6% ±0.5 pp	93.5%	91.0%	Higher
Veterans Civilian population age 18 and older	5.8% ±0.9 pp	4.3%	6.2%	Higher

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 Brentwood . 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 Brentwood housing and cost context or return to the city profile.