Fullerton, California demographics

Fullerton, CA demographics: median age 36.9; 43.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Fullerton city, California · Incorporated city · GEOID 0628000. The survey estimates a population of 140,968 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Fullerton is 36.9 years, with a 90% margin of error of 0.8 years. There are 48,117 households (±752). 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	36.9 ±0.8	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 140,968
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	31,195 ±1,756	22.1% ±1.2 pp	22.0%	22.0%
18–34	35,467 ±1,640	25.2% ±1.2 pp	23.9%	22.8%
35–64	52,871 ±1,829	37.5% ±1.3 pp	38.5%	38.0%
65 and older	21,435 ±1,106	15.2% ±0.8 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 140,968
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	69,858 ±1,354	49.6% ±1.0 pp	49.9%	49.5%
Female	71,110 ±1,353	50.4% ±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: 140,968
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	52,445 ±2,872	37.2% ±2.0 pp	39.7%	61.0%
Black or African American alone	2,848 ±623	2.0% ±0.4 pp	5.4%	12.2%
American Indian and Alaska Native alone	1,206 ±421	0.9% ±0.3 pp	1.3%	0.9%
Asian alone	35,077 ±2,009	24.9% ±1.4 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	269 ±136 · low precision	0.2% ±0.1 pp · low precision	0.4%	0.2%
Some other race alone	23,216 ±2,514	16.5% ±1.8 pp	18.5%	7.1%
Two or more races	25,907 ±2,320	18.4% ±1.6 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 140,968
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	84,189 ±2,683	59.7% ±1.9 pp	59.8%	80.7%
Hispanic or Latino	56,779 ±2,693	40.3% ±1.9 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: 48,117
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	24,744 ±795	51.4% ±1.4 pp	48.4%	46.9%
Other family: male householder, no spouse present	3,107 ±552	6.5% ±1.1 pp	6.3%	5.1%
Other family: female householder, no spouse present	5,539 ±616	11.5% ±1.3 pp	13.1%	12.2%
Nonfamily: householder living alone	10,650 ±709	22.1% ±1.4 pp	24.3%	28.7%
Nonfamily: householder not living alone	4,077 ±498	8.5% ±1.0 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 48,117
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	15,508 ±628	32.2% ±1.2 pp	32.4%	29.5%
Households without people under 18	32,609 ±1,115	67.8% ±2.1 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 48,117
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	10,650 ±709	22.1% ±1.4 pp	24.3%	28.7%
Two-person households	14,407 ±1,052	29.9% ±2.1 pp	30.5%	33.8%
Three-person households	8,837 ±684	18.4% ±1.4 pp	16.7%	15.3%
Four-person households	7,250 ±602	15.1% ±1.2 pp	14.9%	12.6%
Five-person households	4,426 ±550	9.2% ±1.1 pp	7.7%	5.9%
Six-person households	1,650 ±447	3.4% ±0.9 pp	3.3%	2.2%
Seven or more people	897 ±218	1.9% ±0.5 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: 140,968
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	99,604 ±1,924	70.7% ±1.4 pp	73.0%	85.9%
Foreign born	41,364 ±1,925	29.3% ±1.4 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 132,890
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	70,315 ±2,323	52.9% ±1.7 pp	55.6%	77.7%
Spanish	34,709 ±2,287	26.1% ±1.7 pp	28.3%	13.6%
French, Haitian, or Cajun	266 ±155 · low precision	0.2% ±0.1 pp · low precision	0.4%	0.7%
German or other West Germanic	243 ±120	0.2% ±0.1 pp	0.3%	0.5%
Russian, Polish, or other Slavic	225 ±135 · low precision	0.2% ±0.1 pp · low precision	0.7%	0.7%
Other Indo-European	4,017 ±746	3.0% ±0.6 pp	3.5%	2.0%
Korean	12,786 ±1,222	9.6% ±0.9 pp	1.0%	0.3%
Chinese, including Mandarin and Cantonese	3,264 ±607	2.5% ±0.5 pp	3.5%	1.1%
Vietnamese	1,970 ±563	1.5% ±0.4 pp	1.5%	0.5%
Tagalog, including Filipino	2,364 ±527	1.8% ±0.4 pp	2.1%	0.6%
Other Asian and Pacific Island	1,442 ±348	1.1% ±0.3 pp	2.0%	1.1%
Arabic	952 ±477 · low precision	0.7% ±0.4 pp · low precision	0.6%	0.5%
Other and unspecified	337 ±229 · low precision	0.3% ±0.2 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: 95,913
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	11,942 ±1,019	12.5% ±1.1 pp	15.3%	10.4%
High school graduate or equivalency	14,783 ±1,013	15.4% ±1.0 pp	20.5%	26.0%
Some college, no degree	19,246 ±1,227	20.1% ±1.3 pp	19.3%	19.1%
Associate’s degree	8,251 ±881	8.6% ±0.9 pp	7.9%	8.8%
Bachelor’s degree	26,409 ±1,593	27.5% ±1.6 pp	22.7%	21.6%
Graduate or professional degree	15,282 ±906	15.9% ±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: 139,537
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	124,308 ±1,373	89.1% ±0.9 pp	89.2%	87.7%
Moved within same county	8,339 ±987	6.0% ±0.7 pp	6.4%	6.3%
Moved from a different county in the same state	4,641 ±677	3.3% ±0.5 pp	2.6%	3.1%
Moved from a different state	776 ±328	0.6% ±0.2 pp	1.1%	2.3%
Moved from abroad	1,473 ±485	1.1% ±0.3 pp	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

6.7% of Fullerton residents (±1.0 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 94.2% 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	Fullerton	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	6.7% ±1.0 pp	6.6%	8.4%	Not statistically different
Households with a broadband subscription Households	94.2% ±0.8 pp	93.5%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	3.0% ±0.4 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 Fullerton . 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 Fullerton housing and cost context or return to the city profile.