Fountain Valley, California demographics

Fountain Valley, CA demographics: median age 44.4; 46.4% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Fountain Valley city, California · Incorporated city · GEOID 0625380. The survey estimates a population of 56,258 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Fountain Valley is 44.4 years, with a 90% margin of error of 1.4 years. There are 18,778 households (±619). 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	44.4 ±1.4	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 56,258
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	10,685 ±833	19.0% ±1.5 pp	22.0%	22.0%
18–34	11,748 ±926	20.9% ±1.6 pp	23.9%	22.8%
35–64	22,185 ±1,110	39.4% ±2.0 pp	38.5%	38.0%
65 and older	11,640 ±790	20.7% ±1.4 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 56,258
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	28,208 ±758	50.1% ±1.3 pp	49.9%	49.5%
Female	28,050 ±757	49.9% ±1.3 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: 56,258
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	23,021 ±1,324	40.9% ±2.4 pp	39.7%	61.0%
Black or African American alone	916 ±583 · low precision	1.6% ±1.0 pp · low precision	5.4%	12.2%
American Indian and Alaska Native alone	229 ±148 · low precision	0.4% ±0.3 pp · low precision	1.3%	0.9%
Asian alone	20,748 ±1,430	36.9% ±2.5 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	607 ±401 · low precision	1.1% ±0.7 pp · low precision	0.4%	0.2%
Some other race alone	3,178 ±753	5.6% ±1.3 pp	18.5%	7.1%
Two or more races	7,559 ±1,417	13.4% ±2.5 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 56,258
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	46,558 ±1,413	82.8% ±2.5 pp	59.8%	80.7%
Hispanic or Latino	9,700 ±1,413	17.2% ±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: 18,778
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	10,552 ±549	56.2% ±2.3 pp	48.4%	46.9%
Other family: male householder, no spouse present	1,136 ±304	6.0% ±1.6 pp	6.3%	5.1%
Other family: female householder, no spouse present	1,882 ±271	10.0% ±1.4 pp	13.1%	12.2%
Nonfamily: householder living alone	3,870 ±524	20.6% ±2.7 pp	24.3%	28.7%
Nonfamily: householder not living alone	1,338 ±327	7.1% ±1.7 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 18,778
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	5,437 ±345	29.0% ±1.6 pp	32.4%	29.5%
Households without people under 18	13,341 ±743	71.0% ±3.2 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 18,778
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	3,870 ±524	20.6% ±2.7 pp	24.3%	28.7%
Two-person households	5,508 ±561	29.3% ±2.8 pp	30.5%	33.8%
Three-person households	3,622 ±526	19.3% ±2.7 pp	16.7%	15.3%
Four-person households	2,972 ±275	15.8% ±1.4 pp	14.9%	12.6%
Five-person households	1,665 ±341	8.9% ±1.8 pp	7.7%	5.9%
Six-person households	591 ±184	3.1% ±1.0 pp	3.3%	2.2%
Seven or more people	550 ±181	2.9% ±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: 56,258
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	37,757 ±1,153	67.1% ±2.0 pp	73.0%	85.9%
Foreign born	18,501 ±1,157	32.9% ±2.1 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 54,120
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	28,413 ±1,427	52.5% ±2.6 pp	55.6%	77.7%
Spanish	5,409 ±1,094	10.0% ±2.0 pp	28.3%	13.6%
French, Haitian, or Cajun	221 ±156 · low precision	0.4% ±0.3 pp · low precision	0.4%	0.7%
German or other West Germanic	167 ±95 · low precision	0.3% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	103 ±87 · low precision	0.2% ±0.2 pp · low precision	0.7%	0.7%
Other Indo-European	1,031 ±331	1.9% ±0.6 pp	3.5%	2.0%
Korean	458 ±245 · low precision	0.8% ±0.5 pp · low precision	1.0%	0.3%
Chinese, including Mandarin and Cantonese	1,562 ±370	2.9% ±0.7 pp	3.5%	1.1%
Vietnamese	12,025 ±1,227	22.2% ±2.3 pp	1.5%	0.5%
Tagalog, including Filipino	325 ±177 · low precision	0.6% ±0.3 pp · low precision	2.1%	0.6%
Other Asian and Pacific Island	1,812 ±485	3.3% ±0.9 pp	2.0%	1.1%
Arabic	2,186 ±939	4.0% ±1.7 pp	0.6%	0.5%
Other and unspecified	408 ±502 · low precision	0.8% ±0.9 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: 40,806
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	3,580 ±473	8.8% ±1.1 pp	15.3%	10.4%
High school graduate or equivalency	6,966 ±647	17.1% ±1.6 pp	20.5%	26.0%
Some college, no degree	7,847 ±684	19.2% ±1.6 pp	19.3%	19.1%
Associate’s degree	3,464 ±487	8.5% ±1.2 pp	7.9%	8.8%
Bachelor’s degree	13,019 ±950	31.9% ±2.3 pp	22.7%	21.6%
Graduate or professional degree	5,930 ±489	14.5% ±1.2 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: 55,761
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	50,891 ±950	91.3% ±1.7 pp	89.2%	87.7%
Moved within same county	3,793 ±850	6.8% ±1.5 pp	6.4%	6.3%
Moved from a different county in the same state	566 ±255	1.0% ±0.5 pp	2.6%	3.1%
Moved from a different state	380 ±189	0.7% ±0.3 pp	1.1%	2.3%
Moved from abroad	131 ±77 · low precision	0.2% ±0.1 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

3.3% of Fountain Valley residents (±0.6 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	Fountain Valley	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	3.3% ±0.6 pp	6.6%	8.4%	Lower
Households with a broadband subscription Households	94.6% ±1.8 pp	93.5%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	3.1% ±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 Fountain Valley . 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 Fountain Valley housing and cost context or return to the city profile.