Clayton, Missouri demographics

Clayton, MO demographics: median age 30.0; 84.9% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Clayton city, Missouri · Incorporated city · GEOID 2914572. The survey estimates a population of 17,380 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Clayton is 30.0 years, with a 90% margin of error of 1.5 years. There are 6,222 households (±270). 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	30.0 ±1.5	39.0 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 17,380
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Under 18	3,070 ±403	17.7% ±2.3 pp	22.3%	22.0%
18–34	6,554 ±520	37.7% ±3.0 pp	22.3%	22.8%
35–64	5,338 ±545	30.7% ±3.1 pp	37.5%	38.0%
65 and older	2,418 ±300	13.9% ±1.7 pp	17.9%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 17,380
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Male	8,792 ±435	50.6% ±2.5 pp	49.3%	49.5%
Female	8,588 ±435	49.4% ±2.5 pp	50.7%	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: 17,380
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
White alone	11,734 ±609	67.5% ±3.5 pp	77.5%	61.0%
Black or African American alone	1,531 ±250	8.8% ±1.4 pp	11.0%	12.2%
American Indian and Alaska Native alone	56 ±43 · low precision	0.3% ±0.2 pp · low precision	0.3%	0.9%
Asian alone	2,306 ±450	13.3% ±2.6 pp	2.1%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±19 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.2%
Some other race alone	169 ±86 · low precision	1.0% ±0.5 pp · low precision	1.9%	7.1%
Two or more races	1,584 ±416	9.1% ±2.4 pp	7.1%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 17,380
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Not Hispanic or Latino	16,736 ±174	96.3% ±1.0 pp	94.8%	80.7%
Hispanic or Latino	644 ±161	3.7% ±0.9 pp	5.2%	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: 6,222
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Married-couple family	2,670 ±220	42.9% ±3.0 pp	46.5%	46.9%
Other family: male householder, no spouse present	194 ±145 · low precision	3.1% ±2.3 pp · low precision	4.6%	5.1%
Other family: female householder, no spouse present	316 ±115	5.1% ±1.8 pp	11.0%	12.2%
Nonfamily: householder living alone	2,662 ±386	42.8% ±5.9 pp	31.1%	28.7%
Nonfamily: householder not living alone	380 ±172	6.1% ±2.8 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 6,222
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Households with people under 18	1,716 ±239	27.6% ±3.7 pp	28.5%	29.5%
Households without people under 18	4,506 ±424	72.4% ±6.0 pp	71.5%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 6,222
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
One-person nonfamily households	2,662 ±386	42.8% ±5.9 pp	31.1%	28.7%
Two-person households	1,873 ±296	30.1% ±4.6 pp	35.0%	33.8%
Three-person households	720 ±219	11.6% ±3.5 pp	14.1%	15.3%
Four-person households	633 ±164	10.2% ±2.6 pp	11.6%	12.6%
Five-person households	238 ±97	3.8% ±1.5 pp	5.2%	5.9%
Six-person households	83 ±64 · low precision	1.3% ±1.0 pp · low precision	1.9%	2.2%
Seven or more people	13 ±25 · low precision	0.2% ±0.4 pp · low precision	1.1%	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: 17,380
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Native	14,957 ±533	86.1% ±3.1 pp	95.5%	85.9%
Foreign born	2,423 ±528	13.9% ±3.0 pp	4.5%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 16,946
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
English only	14,352 ±494	84.7% ±2.8 pp	93.3%	77.7%
Spanish	328 ±136	1.9% ±0.8 pp	2.9%	13.6%
French, Haitian, or Cajun	98 ±81 · low precision	0.6% ±0.5 pp · low precision	0.3%	0.7%
German or other West Germanic	24 ±37 · low precision	0.1% ±0.2 pp · low precision	0.5%	0.5%
Russian, Polish, or other Slavic	54 ±38 · low precision	0.3% ±0.2 pp · low precision	0.5%	0.7%
Other Indo-European	274 ±133	1.6% ±0.8 pp	0.6%	2.0%
Korean	199 ±141 · low precision	1.2% ±0.8 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	818 ±224	4.8% ±1.3 pp	0.4%	1.1%
Vietnamese	27 ±24 · low precision	0.2% ±0.1 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	101 ±119 · low precision	0.6% ±0.7 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	220 ±106	1.3% ±0.6 pp	0.5%	1.1%
Arabic	362 ±456 · low precision	2.1% ±2.7 pp · low precision	0.2%	0.5%
Other and unspecified	89 ±56 · low precision	0.5% ±0.3 pp · low precision	0.4%	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: 9,809
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Less than high school graduate	296 ±109	3.0% ±1.1 pp	8.1%	10.4%
High school graduate or equivalency	530 ±123	5.4% ±1.2 pp	30.2%	26.0%
Some college, no degree	609 ±159	6.2% ±1.6 pp	20.8%	19.1%
Associate’s degree	45 ±33 · low precision	0.5% ±0.3 pp · low precision	8.4%	8.8%
Bachelor’s degree	3,370 ±426	34.4% ±4.1 pp	19.8%	21.6%
Graduate or professional degree	4,959 ±508	50.6% ±4.8 pp	12.6%	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: 17,289
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Same house	12,625 ±577	73.0% ±3.3 pp	87.4%	87.7%
Moved within same county	1,591 ±385	9.2% ±2.2 pp	6.2%	6.3%
Moved from a different county in the same state	710 ±187	4.1% ±1.1 pp	3.6%	3.1%
Moved from a different state	1,795 ±319	10.4% ±1.8 pp	2.5%	2.3%
Moved from abroad	568 ±274	3.3% ±1.6 pp	0.4%	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

3.1% of Clayton residents (±1.2 percentage points) had no health insurance coverage when surveyed, compared with 8.8% in Missouri and 8.4% nationally. 96.0% 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	Missouri	U.S.	Compared with Missouri
People without health insurance Civilian noninstitutionalized population	3.1% ±1.2 pp	8.8%	8.4%	Lower
Households with a broadband subscription Households	96.0% ±1.4 pp	89.3%	91.0%	Higher
Veterans Civilian population age 18 and older	2.2% ±0.9 pp	7.3%	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 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.