Westminster, California demographics

Westminster, CA demographics: median age 43.2; 25.9% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Westminster city, California · Incorporated city · GEOID 0684550. The survey estimates a population of 89,860 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Westminster is 43.2 years, with a 90% margin of error of 1.2 years. There are 28,150 households (±669). 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	43.2 ±1.2	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 89,860
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	18,410 ±1,230	20.5% ±1.4 pp	22.0%	22.0%
18–34	18,492 ±1,053	20.6% ±1.2 pp	23.9%	22.8%
35–64	35,656 ±1,452	39.7% ±1.6 pp	38.5%	38.0%
65 and older	17,302 ±876	19.3% ±1.0 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 89,860
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	45,161 ±914	50.3% ±1.0 pp	49.9%	49.5%
Female	44,699 ±923	49.7% ±1.0 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: 89,860
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	18,694 ±1,729	20.8% ±1.9 pp	39.7%	61.0%
Black or African American alone	686 ±290	0.8% ±0.3 pp	5.4%	12.2%
American Indian and Alaska Native alone	399 ±240 · low precision	0.4% ±0.3 pp · low precision	1.3%	0.9%
Asian alone	47,465 ±2,330	52.8% ±2.6 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	308 ±268 · low precision	0.3% ±0.3 pp · low precision	0.4%	0.2%
Some other race alone	12,597 ±1,215	14.0% ±1.4 pp	18.5%	7.1%
Two or more races	9,711 ±1,561	10.8% ±1.7 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 89,860
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	67,596 ±1,988	75.2% ±2.2 pp	59.8%	80.7%
Hispanic or Latino	22,264 ±1,989	24.8% ±2.2 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: 28,150
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	15,066 ±667	53.5% ±2.0 pp	48.4%	46.9%
Other family: male householder, no spouse present	2,143 ±309	7.6% ±1.1 pp	6.3%	5.1%
Other family: female householder, no spouse present	4,028 ±452	14.3% ±1.6 pp	13.1%	12.2%
Nonfamily: householder living alone	5,434 ±483	19.3% ±1.7 pp	24.3%	28.7%
Nonfamily: householder not living alone	1,479 ±286	5.3% ±1.0 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 28,150
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	9,452 ±495	33.6% ±1.6 pp	32.4%	29.5%
Households without people under 18	18,698 ±832	66.4% ±2.5 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 28,150
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	5,434 ±483	19.3% ±1.7 pp	24.3%	28.7%
Two-person households	6,945 ±686	24.7% ±2.4 pp	30.5%	33.8%
Three-person households	5,810 ±552	20.6% ±1.9 pp	16.7%	15.3%
Four-person households	4,530 ±441	16.1% ±1.5 pp	14.9%	12.6%
Five-person households	2,545 ±367	9.0% ±1.3 pp	7.7%	5.9%
Six-person households	1,597 ±317	5.7% ±1.1 pp	3.3%	2.2%
Seven or more people	1,289 ±295	4.6% ±1.0 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: 89,860
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	48,123 ±1,753	53.6% ±1.9 pp	73.0%	85.9%
Foreign born	41,737 ±1,745	46.4% ±1.9 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 85,151
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	30,348 ±1,623	35.6% ±1.9 pp	55.6%	77.7%
Spanish	14,320 ±1,734	16.8% ±2.0 pp	28.3%	13.6%
French, Haitian, or Cajun	18 ±18 · low precision	0.0% ±0.0 pp · low precision	0.4%	0.7%
German or other West Germanic	159 ±98 · low precision	0.2% ±0.1 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	209 ±144 · low precision	0.2% ±0.2 pp · low precision	0.7%	0.7%
Other Indo-European	387 ±213 · low precision	0.5% ±0.3 pp · low precision	3.5%	2.0%
Korean	351 ±166	0.4% ±0.2 pp	1.0%	0.3%
Chinese, including Mandarin and Cantonese	1,367 ±467	1.6% ±0.5 pp	3.5%	1.1%
Vietnamese	34,983 ±2,111	41.1% ±2.5 pp	1.5%	0.5%
Tagalog, including Filipino	806 ±315	0.9% ±0.4 pp	2.1%	0.6%
Other Asian and Pacific Island	1,155 ±398	1.4% ±0.5 pp	2.0%	1.1%
Arabic	921 ±379	1.1% ±0.4 pp	0.6%	0.5%
Other and unspecified	127 ±113 · low precision	0.1% ±0.1 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: 64,187
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	14,587 ±1,141	22.7% ±1.7 pp	15.3%	10.4%
High school graduate or equivalency	16,244 ±1,032	25.3% ±1.6 pp	20.5%	26.0%
Some college, no degree	11,315 ±872	17.6% ±1.3 pp	19.3%	19.1%
Associate’s degree	5,414 ±637	8.4% ±1.0 pp	7.9%	8.8%
Bachelor’s degree	11,705 ±722	18.2% ±1.1 pp	22.7%	21.6%
Graduate or professional degree	4,922 ±588	7.7% ±0.9 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: 89,033
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	82,021 ±933	92.1% ±1.0 pp	89.2%	87.7%
Moved within same county	5,258 ±744	5.9% ±0.8 pp	6.4%	6.3%
Moved from a different county in the same state	966 ±343	1.1% ±0.4 pp	2.6%	3.1%
Moved from a different state	203 ±157 · low precision	0.2% ±0.2 pp · low precision	1.1%	2.3%
Moved from abroad	585 ±349 · low precision	0.7% ±0.4 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

6.3% of Westminster residents (±0.8 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 93.5% 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	Westminster	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	6.3% ±0.8 pp	6.6%	8.4%	Not statistically different
Households with a broadband subscription Households	93.5% ±3.1 pp	93.5%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	3.7% ±0.5 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 Westminster . 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 Westminster housing and cost context or return to the city profile.