Clayton, California demographics

Clayton, CA demographics: median age 43.8; 59.1% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Clayton city, California · Incorporated city · GEOID 0613882. The survey estimates a population of 10,937 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Clayton is 43.8 years, with a 90% margin of error of 2.0 years. There are 3,982 households (±187). 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	43.8 ±2.0	37.9 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 10,937
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Under 18	2,585 ±442	23.6% ±4.0 pp	22.0%	22.0%
18–34	1,807 ±329	16.5% ±3.0 pp	23.9%	22.8%
35–64	4,781 ±497	43.7% ±4.5 pp	38.5%	38.0%
65 and older	1,764 ±242	16.1% ±2.2 pp	15.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 10,937
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Male	5,408 ±363	49.4% ±3.3 pp	49.9%	49.5%
Female	5,529 ±368	50.6% ±3.4 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: 10,937
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
White alone	7,300 ±592	66.7% ±5.4 pp	39.7%	61.0%
Black or African American alone	69 ±48 · low precision	0.6% ±0.4 pp · low precision	5.4%	12.2%
American Indian and Alaska Native alone	39 ±47 · low precision	0.4% ±0.4 pp · low precision	1.3%	0.9%
Asian alone	1,387 ±499	12.7% ±4.6 pp	15.5%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±21 · low precision	0.0% ±0.2 pp · low precision	0.4%	0.2%
Some other race alone	278 ±175 · low precision	2.5% ±1.6 pp · low precision	18.5%	7.1%
Two or more races	1,864 ±438	17.0% ±4.0 pp	19.2%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 10,937
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Not Hispanic or Latino	9,456 ±337	86.5% ±3.1 pp	59.8%	80.7%
Hispanic or Latino	1,481 ±336	13.5% ±3.1 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: 3,982
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Married-couple family	2,447 ±175	61.5% ±3.3 pp	48.4%	46.9%
Other family: male householder, no spouse present	182 ±109 · low precision	4.6% ±2.7 pp · low precision	6.3%	5.1%
Other family: female householder, no spouse present	517 ±180	13.0% ±4.5 pp	13.1%	12.2%
Nonfamily: householder living alone	745 ±187	18.7% ±4.6 pp	24.3%	28.7%
Nonfamily: householder not living alone	91 ±63 · low precision	2.3% ±1.6 pp · low precision	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 3,982
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Households with people under 18	1,411 ±190	35.4% ±4.5 pp	32.4%	29.5%
Households without people under 18	2,571 ±296	64.6% ±6.8 pp	67.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 3,982
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
One-person nonfamily households	745 ±187	18.7% ±4.6 pp	24.3%	28.7%
Two-person households	1,327 ±215	33.3% ±5.2 pp	30.5%	33.8%
Three-person households	706 ±195	17.7% ±4.8 pp	16.7%	15.3%
Four-person households	841 ±188	21.1% ±4.6 pp	14.9%	12.6%
Five-person households	281 ±109	7.1% ±2.7 pp	7.7%	5.9%
Six-person households	82 ±75 · low precision	2.1% ±1.9 pp · low precision	3.3%	2.2%
Seven or more people	0 ±30 · low precision	0.0% ±0.7 pp · low precision	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: 10,937
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Native	9,469 ±300	86.6% ±2.7 pp	73.0%	85.9%
Foreign born	1,468 ±297	13.4% ±2.7 pp	27.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 10,598
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
English only	9,315 ±401	87.9% ±3.6 pp	55.6%	77.7%
Spanish	291 ±149 · low precision	2.7% ±1.4 pp · low precision	28.3%	13.6%
French, Haitian, or Cajun	16 ±27 · low precision	0.2% ±0.3 pp · low precision	0.4%	0.7%
German or other West Germanic	15 ±17 · low precision	0.1% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	142 ±151 · low precision	1.3% ±1.4 pp · low precision	0.7%	0.7%
Other Indo-European	358 ±227 · low precision	3.4% ±2.1 pp · low precision	3.5%	2.0%
Korean	0 ±21 · low precision	0.0% ±0.2 pp · low precision	1.0%	0.3%
Chinese, including Mandarin and Cantonese	208 ±172 · low precision	2.0% ±1.6 pp · low precision	3.5%	1.1%
Vietnamese	0 ±21 · low precision	0.0% ±0.2 pp · low precision	1.5%	0.5%
Tagalog, including Filipino	75 ±78 · low precision	0.7% ±0.7 pp · low precision	2.1%	0.6%
Other Asian and Pacific Island	40 ±62 · low precision	0.4% ±0.6 pp · low precision	2.0%	1.1%
Arabic	12 ±22 · low precision	0.1% ±0.2 pp · low precision	0.6%	0.5%
Other and unspecified	126 ±208 · low precision	1.2% ±2.0 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: 7,352
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Less than high school graduate	70 ±80 · low precision	1.0% ±1.1 pp · low precision	15.3%	10.4%
High school graduate or equivalency	805 ±239	10.9% ±3.2 pp	20.5%	26.0%
Some college, no degree	1,358 ±283	18.5% ±3.8 pp	19.3%	19.1%
Associate’s degree	777 ±187	10.6% ±2.5 pp	7.9%	8.8%
Bachelor’s degree	3,049 ±304	41.5% ±3.6 pp	22.7%	21.6%
Graduate or professional degree	1,293 ±205	17.6% ±2.7 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: 10,907
Category	Count ± MOE	Share ± MOE (pp)	California	U.S.
Same house	10,313 ±307	94.6% ±2.8 pp	89.2%	87.7%
Moved within same county	438 ±251 · low precision	4.0% ±2.3 pp · low precision	6.4%	6.3%
Moved from a different county in the same state	76 ±86 · low precision	0.7% ±0.8 pp · low precision	2.6%	3.1%
Moved from a different state	56 ±54 · low precision	0.5% ±0.5 pp · low precision	1.1%	2.3%
Moved from abroad	24 ±31 · low precision	0.2% ±0.3 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

1.9% of Clayton residents (±1.4 percentage points) had no health insurance coverage when surveyed, compared with 6.6% in California and 8.4% nationally. 98.3% 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	Clayton	California	U.S.	Compared with California
People without health insurance Civilian noninstitutionalized population	1.9% ±1.4 pp · low precision	6.6%	8.4%	Lower
Households with a broadband subscription Households	98.3% ±0.9 pp	93.5%	91.0%	Higher
Veterans Civilian population age 18 and older	4.0% ±1.2 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 Clayton . 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 Clayton housing and cost context or return to the city profile.