Union City, California demographics

Union City, CA demographics: median age 43.0; 45.1% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Union City city, California · Incorporated city · GEOID 0681204. The survey estimates a population of 67,464 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Union City is 43.0 years, with a 90% margin of error of 0.9 years. There are 21,240 households (±521). 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	43.0 ±0.9	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 67,464
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	11,451 ±796	17.0% ±1.2 pp	22.0%	22.0%
18–34	14,708 ±884	21.8% ±1.3 pp	23.9%	22.8%
35–64	28,204 ±1,189	41.8% ±1.8 pp	38.5%	38.0%
65 and older	13,101 ±775	19.4% ±1.1 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 67,464
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	33,620 ±571	49.8% ±0.8 pp	49.9%	49.5%
Female	33,844 ±574	50.2% ±0.8 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: 67,464
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	10,875 ±1,219	16.1% ±1.8 pp	39.7%	61.0%
Black or African American alone	3,031 ±700	4.5% ±1.0 pp	5.4%	12.2%
American Indian and Alaska Native alone	694 ±252	1.0% ±0.4 pp	1.3%	0.9%
Asian alone	38,793 ±1,348	57.5% ±2.0 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	418 ±192	0.6% ±0.3 pp	0.4%	0.2%
Some other race alone	6,940 ±908	10.3% ±1.3 pp	18.5%	7.1%
Two or more races	6,713 ±1,020	10.0% ±1.5 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 67,464
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	53,838 ±1,164	79.8% ±1.7 pp	59.8%	80.7%
Hispanic or Latino	13,626 ±1,154	20.2% ±1.7 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: 21,240
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	13,023 ±452	61.3% ±1.5 pp	48.4%	46.9%
Other family: male householder, no spouse present	1,407 ±258	6.6% ±1.2 pp	6.3%	5.1%
Other family: female householder, no spouse present	2,115 ±312	10.0% ±1.4 pp	13.1%	12.2%
Nonfamily: householder living alone	3,730 ±455	17.6% ±2.1 pp	24.3%	28.7%
Nonfamily: householder not living alone	965 ±195	4.5% ±0.9 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 21,240
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	6,757 ±343	31.8% ±1.4 pp	32.4%	29.5%
Households without people under 18	14,483 ±669	68.2% ±2.7 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 21,240
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	3,730 ±455	17.6% ±2.1 pp	24.3%	28.7%
Two-person households	6,066 ±476	28.6% ±2.1 pp	30.5%	33.8%
Three-person households	4,065 ±416	19.1% ±1.9 pp	16.7%	15.3%
Four-person households	3,841 ±402	18.1% ±1.8 pp	14.9%	12.6%
Five-person households	2,042 ±290	9.6% ±1.3 pp	7.7%	5.9%
Six-person households	909 ±176	4.3% ±0.8 pp	3.3%	2.2%
Seven or more people	587 ±137	2.8% ±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: 67,464
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	34,618 ±1,249	51.3% ±1.9 pp	73.0%	85.9%
Foreign born	32,846 ±1,249	48.7% ±1.9 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 64,497
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	23,817 ±1,316	36.9% ±2.0 pp	55.6%	77.7%
Spanish	8,695 ±930	13.5% ±1.4 pp	28.3%	13.6%
French, Haitian, or Cajun	135 ±67	0.2% ±0.1 pp	0.4%	0.7%
German or other West Germanic	146 ±89 · low precision	0.2% ±0.1 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	242 ±147 · low precision	0.4% ±0.2 pp · low precision	0.7%	0.7%
Other Indo-European	9,772 ±953	15.2% ±1.5 pp	3.5%	2.0%
Korean	756 ±331	1.2% ±0.5 pp	1.0%	0.3%
Chinese, including Mandarin and Cantonese	7,406 ±783	11.5% ±1.2 pp	3.5%	1.1%
Vietnamese	1,264 ±308	2.0% ±0.5 pp	1.5%	0.5%
Tagalog, including Filipino	8,456 ±1,057	13.1% ±1.6 pp	2.1%	0.6%
Other Asian and Pacific Island	2,863 ±610	4.4% ±0.9 pp	2.0%	1.1%
Arabic	368 ±246 · low precision	0.6% ±0.4 pp · low precision	0.6%	0.5%
Other and unspecified	577 ±317 · low precision	0.9% ±0.5 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: 51,182
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	6,857 ±732	13.4% ±1.4 pp	15.3%	10.4%
High school graduate or equivalency	9,474 ±880	18.5% ±1.7 pp	20.5%	26.0%
Some college, no degree	8,156 ±620	15.9% ±1.2 pp	19.3%	19.1%
Associate’s degree	3,594 ±389	7.0% ±0.8 pp	7.9%	8.8%
Bachelor’s degree	14,136 ±798	27.6% ±1.5 pp	22.7%	21.6%
Graduate or professional degree	8,965 ±679	17.5% ±1.3 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: 67,066
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	60,356 ±782	90.0% ±1.1 pp	89.2%	87.7%
Moved within same county	4,205 ±848	6.3% ±1.3 pp	6.4%	6.3%
Moved from a different county in the same state	1,548 ±359	2.3% ±0.5 pp	2.6%	3.1%
Moved from a different state	363 ±159	0.5% ±0.2 pp	1.1%	2.3%
Moved from abroad	594 ±250	0.9% ±0.4 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

2.9% of Union City residents (±0.5 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 95.1% 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	Union City	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	2.9% ±0.5 pp	6.6%	8.4%	Lower
Households with a broadband subscription Households	95.1% ±1.0 pp	93.5%	91.0%	Higher
Veterans Civilian population age 18 and older	3.4% ±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 Union City . 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 Union City housing and cost context or return to the city profile.