Mount Sterling, Illinois demographics

Mount Sterling, IL demographics: median age 35.3; 21.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Mount Sterling city, Illinois · Incorporated city · GEOID 1751154. The survey estimates a population of 1,980 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Mount Sterling is 35.3 years, with a 90% margin of error of 5.1 years. There are 941 households (±114). 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	35.3 ±5.1	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 1,980
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	500 ±107	25.3% ±5.0 pp	21.8%	22.0%
18–34	486 ±98	24.5% ±4.5 pp	22.7%	22.8%
35–64	673 ±131	34.0% ±6.0 pp	38.5%	38.0%
65 and older	321 ±76	16.2% ±3.6 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 1,980
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	913 ±141	46.1% ±5.9 pp	49.4%	49.5%
Female	1,067 ±113	53.9% ±3.4 pp	50.6%	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: 1,980
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	1,894 ±164	95.7% ±1.4 pp	61.0%	61.0%
Black or African American alone	16 ±19 · low precision	0.8% ±1.0 pp · low precision	13.6%	12.2%
American Indian and Alaska Native alone	0 ±13 · low precision	0.0% ±0.7 pp · low precision	0.6%	0.9%
Asian alone	0 ±13 · low precision	0.0% ±0.7 pp · low precision	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±13 · low precision	0.0% ±0.7 pp · low precision	0.0%	0.2%
Some other race alone	17 ±34 · low precision	0.9% ±1.7 pp · low precision	7.9%	7.1%
Two or more races	53 ±44 · low precision	2.7% ±2.2 pp · low precision	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 1,980
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	1,935 ±163	97.7% ±11.7 pp	81.2%	80.7%
Hispanic or Latino	45 ±42 · low precision	2.3% ±2.1 pp · low precision	18.8%	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: 941
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	293 ±71	31.1% ±6.5 pp	45.3%	46.9%
Other family: male householder, no spouse present	64 ±44 · low precision	6.8% ±4.6 pp · low precision	4.9%	5.1%
Other family: female householder, no spouse present	90 ±60 · low precision	9.6% ±6.3 pp · low precision	11.9%	12.2%
Nonfamily: householder living alone	417 ±119	44.3% ±11.4 pp	31.2%	28.7%
Nonfamily: householder not living alone	77 ±55 · low precision	8.2% ±5.8 pp · low precision	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 941
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	246 ±78	26.1% ±7.7 pp	28.6%	29.5%
Households without people under 18	695 ±117	73.9% ±8.6 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 941
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	417 ±119	44.3% ±11.4 pp	31.2%	28.7%
Two-person households	329 ±104	35.0% ±10.2 pp	32.3%	33.8%
Three-person households	69 ±47 · low precision	7.3% ±4.9 pp · low precision	14.7%	15.3%
Four-person households	63 ±43 · low precision	6.7% ±4.5 pp · low precision	12.6%	12.6%
Five-person households	40 ±35 · low precision	4.3% ±3.7 pp · low precision	5.8%	5.9%
Six-person households	18 ±23 · low precision	1.9% ±2.4 pp · low precision	2.1%	2.2%
Seven or more people	5 ±16 · low precision	0.5% ±1.7 pp · low precision	1.3%	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: 1,980
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	1,969 ±167	99.4% ±12.0 pp	85.3%	85.9%
Foreign born	11 ±26 · low precision	0.6% ±1.3 pp · low precision	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 1,880
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	1,869 ±164	99.4% ±12.3 pp	76.0%	77.7%
Spanish	9 ±26 · low precision	0.5% ±1.4 pp · low precision	14.0%	13.6%
French, Haitian, or Cajun	0 ±13 · low precision	0.0% ±0.7 pp · low precision	0.3%	0.7%
German or other West Germanic	0 ±13 · low precision	0.0% ±0.7 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	0 ±13 · low precision	0.0% ±0.7 pp · low precision	2.5%	0.7%
Other Indo-European	2 ±3 · low precision	0.1% ±0.2 pp · low precision	2.6%	2.0%
Korean	0 ±13 · low precision	0.0% ±0.7 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	0 ±13 · low precision	0.0% ±0.7 pp · low precision	0.9%	1.1%
Vietnamese	0 ±13 · low precision	0.0% ±0.7 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	0 ±13 · low precision	0.0% ±0.7 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	0 ±13 · low precision	0.0% ±0.7 pp · low precision	1.0%	1.1%
Arabic	0 ±13 · low precision	0.0% ±0.7 pp · low precision	0.6%	0.5%
Other and unspecified	0 ±13 · low precision	0.0% ±0.7 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: 1,295
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	158 ±91 · low precision	12.2% ±6.9 pp · low precision	9.5%	10.4%
High school graduate or equivalency	464 ±88	35.8% ±5.6 pp	25.1%	26.0%
Some college, no degree	266 ±85	20.5% ±6.2 pp	19.2%	19.1%
Associate’s degree	129 ±75 · low precision	10.0% ±5.7 pp · low precision	8.3%	8.8%
Bachelor’s degree	232 ±81	17.9% ±6.0 pp	22.6%	21.6%
Graduate or professional degree	46 ±34 · low precision	3.6% ±2.6 pp · low precision	15.3%	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: 1,954
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	1,441 ±225	73.7% ±9.6 pp	88.9%	87.7%
Moved within same county	146 ±98 · low precision	7.5% ±5.0 pp · low precision	6.4%	6.3%
Moved from a different county in the same state	320 ±165 · low precision	16.4% ±8.3 pp · low precision	2.4%	3.1%
Moved from a different state	43 ±57 · low precision	2.2% ±2.9 pp · low precision	1.6%	2.3%
Moved from abroad	4 ±6 · low precision	0.2% ±0.3 pp · low precision	0.6%	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

0.6% of Mount Sterling residents (±1.2 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 76.7% 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	Mount Sterling	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	0.6% ±1.2 pp · low precision	6.9%	8.4%	Lower
Households with a broadband subscription Households	76.7% ±4.5 pp	90.8%	91.0%	Lower
Veterans Civilian population age 18 and older	4.4% ±3.1 pp · low precision	4.8%	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 Mount Sterling . 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 Mount Sterling housing and cost context or return to the city profile.