St. Ann, Missouri demographics

St. Ann, MO demographics: median age 34.8; 20.4% 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. Ann city, Missouri · Incorporated city · GEOID 2963956. The survey estimates a population of 12,811 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in St. Ann is 34.8 years, with a 90% margin of error of 1.6 years. There are 5,880 households (±418). 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	34.8 ±1.6	39.0 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 12,811
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Under 18	3,022 ±480	23.6% ±3.7 pp	22.3%	22.0%
18–34	3,477 ±571	27.1% ±4.5 pp	22.3%	22.8%
35–64	4,213 ±603	32.9% ±4.7 pp	37.5%	38.0%
65 and older	2,099 ±402	16.4% ±3.1 pp	17.9%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 12,811
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Male	6,323 ±431	49.4% ±3.4 pp	49.3%	49.5%
Female	6,488 ±433	50.6% ±3.4 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: 12,811
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
White alone	7,726 ±831	60.3% ±6.5 pp	77.5%	61.0%
Black or African American alone	3,151 ±754	24.6% ±5.9 pp	11.0%	12.2%
American Indian and Alaska Native alone	20 ±25 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.9%
Asian alone	270 ±238 · low precision	2.1% ±1.9 pp · low precision	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	594 ±499 · low precision	4.6% ±3.9 pp · low precision	1.9%	7.1%
Two or more races	1,050 ±374	8.2% ±2.9 pp	7.1%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 12,811
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Not Hispanic or Latino	11,158 ±727	87.1% ±5.7 pp	94.8%	80.7%
Hispanic or Latino	1,653 ±725	12.9% ±5.7 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: 5,880
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Married-couple family	1,436 ±268	24.4% ±4.2 pp	46.5%	46.9%
Other family: male householder, no spouse present	551 ±251	9.4% ±4.2 pp	4.6%	5.1%
Other family: female householder, no spouse present	1,136 ±246	19.3% ±4.0 pp	11.0%	12.2%
Nonfamily: householder living alone	2,415 ±443	41.1% ±6.9 pp	31.1%	28.7%
Nonfamily: householder not living alone	342 ±151	5.8% ±2.5 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 5,880
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Households with people under 18	1,648 ±243	28.0% ±3.6 pp	28.5%	29.5%
Households without people under 18	4,232 ±546	72.0% ±7.7 pp	71.5%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 5,880
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
One-person nonfamily households	2,415 ±443	41.1% ±6.9 pp	31.1%	28.7%
Two-person households	1,641 ±382	27.9% ±6.2 pp	35.0%	33.8%
Three-person households	816 ±236	13.9% ±3.9 pp	14.1%	15.3%
Four-person households	864 ±263	14.7% ±4.4 pp	11.6%	12.6%
Five-person households	106 ±83 · low precision	1.8% ±1.4 pp · low precision	5.2%	5.9%
Six-person households	29 ±35 · low precision	0.5% ±0.6 pp · low precision	1.9%	2.2%
Seven or more people	9 ±27 · low precision	0.2% ±0.5 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: 12,811
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Native	11,382 ±683	88.8% ±5.3 pp	95.5%	85.9%
Foreign born	1,429 ±680	11.2% ±5.3 pp	4.5%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 12,228
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
English only	10,353 ±730	84.7% ±5.8 pp	93.3%	77.7%
Spanish	1,371 ±697 · low precision	11.2% ±5.7 pp · low precision	2.9%	13.6%
French, Haitian, or Cajun	0 ±19 · low precision	0.0% ±0.2 pp · low precision	0.3%	0.7%
German or other West Germanic	85 ±89 · low precision	0.7% ±0.7 pp · low precision	0.5%	0.5%
Russian, Polish, or other Slavic	45 ±55 · low precision	0.4% ±0.4 pp · low precision	0.5%	0.7%
Other Indo-European	97 ±176 · low precision	0.8% ±1.4 pp · low precision	0.6%	2.0%
Korean	0 ±19 · low precision	0.0% ±0.2 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	103 ±101 · low precision	0.8% ±0.8 pp · low precision	0.4%	1.1%
Vietnamese	0 ±19 · low precision	0.0% ±0.2 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	0 ±19 · low precision	0.0% ±0.2 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	10 ±17 · low precision	0.1% ±0.1 pp · low precision	0.5%	1.1%
Arabic	0 ±19 · low precision	0.0% ±0.2 pp · low precision	0.2%	0.5%
Other and unspecified	164 ±201 · low precision	1.3% ±1.6 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: 8,638
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Less than high school graduate	937 ±328	10.8% ±3.8 pp	8.1%	10.4%
High school graduate or equivalency	3,114 ±463	36.1% ±5.0 pp	30.2%	26.0%
Some college, no degree	2,066 ±375	23.9% ±4.2 pp	20.8%	19.1%
Associate’s degree	758 ±293	8.8% ±3.4 pp	8.4%	8.8%
Bachelor’s degree	1,493 ±291	17.3% ±3.2 pp	19.8%	21.6%
Graduate or professional degree	270 ±129	3.1% ±1.5 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: 12,753
Category	Count ± MOE	Share ± MOE (pp)	Missouri	U.S.
Same house	11,282 ±558	88.5% ±4.4 pp	87.4%	87.7%
Moved within same county	1,105 ±520	8.7% ±4.1 pp	6.2%	6.3%
Moved from a different county in the same state	216 ±174 · low precision	1.7% ±1.4 pp · low precision	3.6%	3.1%
Moved from a different state	116 ±97 · low precision	0.9% ±0.8 pp · low precision	2.5%	2.3%
Moved from abroad	34 ±58 · low precision	0.3% ±0.5 pp · low precision	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

13.1% of St. Ann residents (±3.8 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. Ann	Missouri	U.S.	Compared with Missouri
People without health insurance Civilian noninstitutionalized population	13.1% ±3.8 pp	8.8%	8.4%	Higher
Households with a broadband subscription Households	86.8% ±5.5 pp	89.3%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	3.7% ±1.3 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. Ann . 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. Ann housing and cost context or return to the city profile.