Antioch, California demographics

Antioch, CA demographics: median age 38.4; 23.9% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Antioch city, California · Incorporated city · GEOID 0602252. The survey estimates a population of 116,477 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Antioch is 38.4 years, with a 90% margin of error of 1.1 years. There are 37,381 households (±1,018). 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	38.4 ±1.1	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 116,477
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	26,550 ±1,476	22.8% ±1.3 pp	22.0%	22.0%
18–34	26,118 ±1,448	22.4% ±1.2 pp	23.9%	22.8%
35–64	47,172 ±1,920	40.5% ±1.6 pp	38.5%	38.0%
65 and older	16,637 ±1,135	14.3% ±1.0 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 116,477
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	55,772 ±1,091	47.9% ±0.9 pp	49.9%	49.5%
Female	60,705 ±1,092	52.1% ±0.9 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: 116,477
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	31,444 ±1,770	27.0% ±1.5 pp	39.7%	61.0%
Black or African American alone	22,025 ±1,993	18.9% ±1.7 pp	5.4%	12.2%
American Indian and Alaska Native alone	1,913 ±626	1.6% ±0.5 pp	1.3%	0.9%
Asian alone	16,549 ±1,676	14.2% ±1.4 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	1,325 ±607	1.1% ±0.5 pp	0.4%	0.2%
Some other race alone	21,364 ±1,901	18.3% ±1.6 pp	18.5%	7.1%
Two or more races	21,857 ±2,038	18.8% ±1.7 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 116,477
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	75,036 ±2,430	64.4% ±2.1 pp	59.8%	80.7%
Hispanic or Latino	41,441 ±2,428	35.6% ±2.1 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: 37,381
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	18,515 ±953	49.5% ±2.2 pp	48.4%	46.9%
Other family: male householder, no spouse present	2,610 ±475	7.0% ±1.3 pp	6.3%	5.1%
Other family: female householder, no spouse present	7,344 ±711	19.6% ±1.8 pp	13.1%	12.2%
Nonfamily: householder living alone	6,398 ±931	17.1% ±2.4 pp	24.3%	28.7%
Nonfamily: householder not living alone	2,514 ±580	6.7% ±1.5 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 37,381
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	14,303 ±631	38.3% ±1.3 pp	32.4%	29.5%
Households without people under 18	23,078 ±1,312	61.7% ±3.1 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 37,381
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	6,398 ±931	17.1% ±2.4 pp	24.3%	28.7%
Two-person households	10,827 ±965	29.0% ±2.5 pp	30.5%	33.8%
Three-person households	7,991 ±788	21.4% ±2.0 pp	16.7%	15.3%
Four-person households	5,123 ±605	13.7% ±1.6 pp	14.9%	12.6%
Five-person households	4,439 ±537	11.9% ±1.4 pp	7.7%	5.9%
Six-person households	1,481 ±337	4.0% ±0.9 pp	3.3%	2.2%
Seven or more people	1,122 ±321	3.0% ±0.9 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: 116,477
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	87,775 ±1,553	75.4% ±1.3 pp	73.0%	85.9%
Foreign born	28,702 ±1,544	24.6% ±1.3 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 109,628
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	68,343 ±2,000	62.3% ±1.8 pp	55.6%	77.7%
Spanish	25,697 ±1,829	23.4% ±1.7 pp	28.3%	13.6%
French, Haitian, or Cajun	251 ±169 · low precision	0.2% ±0.2 pp · low precision	0.4%	0.7%
German or other West Germanic	213 ±170 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	417 ±228 · low precision	0.4% ±0.2 pp · low precision	0.7%	0.7%
Other Indo-European	2,565 ±661	2.3% ±0.6 pp	3.5%	2.0%
Korean	143 ±117 · low precision	0.1% ±0.1 pp · low precision	1.0%	0.3%
Chinese, including Mandarin and Cantonese	1,862 ±551	1.7% ±0.5 pp	3.5%	1.1%
Vietnamese	1,434 ±569	1.3% ±0.5 pp	1.5%	0.5%
Tagalog, including Filipino	5,841 ±1,114	5.3% ±1.0 pp	2.1%	0.6%
Other Asian and Pacific Island	1,643 ±509	1.5% ±0.5 pp	2.0%	1.1%
Arabic	250 ±159 · low precision	0.2% ±0.1 pp · low precision	0.6%	0.5%
Other and unspecified	969 ±298	0.9% ±0.3 pp	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: 79,937
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	11,729 ±1,226	14.7% ±1.5 pp	15.3%	10.4%
High school graduate or equivalency	22,627 ±1,627	28.3% ±2.0 pp	20.5%	26.0%
Some college, no degree	19,369 ±1,375	24.2% ±1.7 pp	19.3%	19.1%
Associate’s degree	7,094 ±705	8.9% ±0.9 pp	7.9%	8.8%
Bachelor’s degree	13,771 ±988	17.2% ±1.2 pp	22.7%	21.6%
Graduate or professional degree	5,347 ±676	6.7% ±0.8 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: 115,197
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	104,139 ±1,462	90.4% ±1.2 pp	89.2%	87.7%
Moved within same county	6,883 ±1,169	6.0% ±1.0 pp	6.4%	6.3%
Moved from a different county in the same state	3,021 ±689	2.6% ±0.6 pp	2.6%	3.1%
Moved from a different state	918 ±383	0.8% ±0.3 pp	1.1%	2.3%
Moved from abroad	236 ±152 · 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

6.4% of Antioch residents (±1.0 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 95.8% 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	Antioch	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	6.4% ±1.0 pp	6.6%	8.4%	Not statistically different
Households with a broadband subscription Households	95.8% ±0.8 pp	93.5%	91.0%	Higher
Veterans Civilian population age 18 and older	4.8% ±0.7 pp	4.3%	6.2%	Not statistically different

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