St. Louis, Missouri demographics

St. Louis, MO demographics: median age 36.8; 41.1% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · St. Louis city, Missouri · Incorporated city · GEOID 2965000. The survey estimates a population of 288,512 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in St. Louis is 36.8 years, with a 90% margin of error of 0.2 years. There are 144,891 households (±1,211). 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	36.8 ±0.2	39.0 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 288,512
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Under 18	52,870 ±1,249	18.3% MOE unavailable	22.3%	22.0%
18–34	81,731 MOE unavailable	28.3% MOE unavailable	22.3%	22.8%
35–64	109,204 ±1,809	37.9% MOE unavailable	37.5%	38.0%
65 and older	44,707 ±1,451	15.5% MOE unavailable	17.9%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 288,512
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Male	139,796 ±83	48.5% MOE unavailable	49.3%	49.5%
Female	148,716 ±83	51.5% MOE unavailable	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: 288,512
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
White alone	131,235 ±616	45.5% MOE unavailable	77.5%	61.0%
Black or African American alone	121,932 ±1,090	42.3% MOE unavailable	11.0%	12.2%
American Indian and Alaska Native alone	723 ±258	0.3% MOE unavailable	0.3%	0.9%
Asian alone	10,200 ±332	3.5% MOE unavailable	2.1%	6.0%
Native Hawaiian and Other Pacific Islander alone	77 ±78 · low precision	0.0% MOE unavailable	0.1%	0.2%
Some other race alone	5,695 ±860	2.0% MOE unavailable	1.9%	7.1%
Two or more races	18,650 ±1,335	6.5% MOE unavailable	7.1%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 288,512
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Not Hispanic or Latino	273,215 MOE unavailable	94.7% MOE unavailable	94.8%	80.7%
Hispanic or Latino	15,297 MOE unavailable	5.3% MOE unavailable	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: 144,891
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Married-couple family	34,055 ±1,194	23.5% ±0.8 pp	46.5%	46.9%
Other family: male householder, no spouse present	6,493 ±797	4.5% ±0.5 pp	4.6%	5.1%
Other family: female householder, no spouse present	19,963 ±989	13.8% ±0.7 pp	11.0%	12.2%
Nonfamily: householder living alone	69,545 ±1,835	48.0% ±1.2 pp	31.1%	28.7%
Nonfamily: householder not living alone	14,835 ±908	10.2% ±0.6 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 144,891
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Households with people under 18	27,431 ±1,142	18.9% ±0.8 pp	28.5%	29.5%
Households without people under 18	117,460 ±1,516	81.1% ±0.8 pp	71.5%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 144,891
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
One-person nonfamily households	69,545 ±1,835	48.0% ±1.2 pp	31.1%	28.7%
Two-person households	43,823 ±1,565	30.2% ±1.0 pp	35.0%	33.8%
Three-person households	14,890 ±1,143	10.3% ±0.8 pp	14.1%	15.3%
Four-person households	10,272 ±820	7.1% ±0.6 pp	11.6%	12.6%
Five-person households	3,864 ±602	2.7% ±0.4 pp	5.2%	5.9%
Six-person households	1,555 ±350	1.1% ±0.2 pp	1.9%	2.2%
Seven or more people	942 ±348	0.7% ±0.2 pp	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: 288,512
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Native	268,062 ±1,259	92.9% MOE unavailable	95.5%	85.9%
Foreign born	20,450 ±1,259	7.1% MOE unavailable	4.5%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 272,092
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
English only	246,414 ±1,513	90.6% MOE unavailable	93.3%	77.7%
Spanish	8,738 ±773	3.2% MOE unavailable	2.9%	13.6%
French, Haitian, or Cajun	1,738 ±540	0.6% MOE unavailable	0.3%	0.7%
German or other West Germanic	1,048 ±291	0.4% MOE unavailable	0.5%	0.5%
Russian, Polish, or other Slavic	1,126 ±338	0.4% MOE unavailable	0.5%	0.7%
Other Indo-European	3,382 ±552	1.2% MOE unavailable	0.6%	2.0%
Korean	741 ±277	0.3% MOE unavailable	0.1%	0.3%
Chinese, including Mandarin and Cantonese	2,049 ±387	0.8% MOE unavailable	0.4%	1.1%
Vietnamese	1,498 ±348	0.6% MOE unavailable	0.2%	0.5%
Tagalog, including Filipino	557 ±155	0.2% MOE unavailable	0.2%	0.6%
Other Asian and Pacific Island	1,472 ±341	0.5% MOE unavailable	0.5%	1.1%
Arabic	848 ±339	0.3% MOE unavailable	0.2%	0.5%
Other and unspecified	2,481 ±752	0.9% MOE unavailable	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: 210,685
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Less than high school graduate	19,332 ±1,299	9.2% ±0.6 pp	8.1%	10.4%
High school graduate or equivalency	50,736 ±1,937	24.1% ±0.9 pp	30.2%	26.0%
Some college, no degree	40,058 ±1,709	19.0% ±0.8 pp	20.8%	19.1%
Associate’s degree	13,879 ±1,005	6.6% ±0.5 pp	8.4%	8.8%
Bachelor’s degree	47,524 ±1,505	22.6% ±0.7 pp	19.8%	21.6%
Graduate or professional degree	39,156 ±1,579	18.6% ±0.7 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: 285,113
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Same house	243,847 ±2,105	85.5% ±0.7 pp	87.4%	87.7%
Moved within same county	19,395 ±1,747	6.8% ±0.6 pp	6.2%	6.3%
Moved from a different county in the same state	10,532 ±1,138	3.7% ±0.4 pp	3.6%	3.1%
Moved from a different state	9,296 ±884	3.3% ±0.3 pp	2.5%	2.3%
Moved from abroad	2,043 ±553	0.7% ±0.2 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

9.3% of St. Louis residents (±0.5 percentage points) had no health insurance coverage when surveyed, compared with 8.8% in Missouri and 8.4% nationally. 86.8% 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	St. Louis	Missouri	U.S.	Compared with Missouri
People without health insurance Civilian noninstitutionalized population	9.3% ±0.5 pp	8.8%	8.4%	Not statistically different
Households with a broadband subscription Households	86.8% ±0.6 pp	89.3%	91.0%	Lower
Veterans Civilian population age 18 and older	5.6% ±0.4 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 St. Louis . 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 St. Louis housing and cost context or return to the city profile.