Fairview Heights, Illinois demographics

Fairview Heights, IL demographics: median age 41.0; 34.7% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Fairview Heights city, Illinois · Incorporated city · GEOID 1725141. The survey estimates a population of 16,745 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Fairview Heights is 41.0 years, with a 90% margin of error of 2.5 years. There are 7,221 households (±465). 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	41.0 ±2.5	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 16,745
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	3,585 ±532	21.4% ±3.0 pp	21.8%	22.0%
18–34	3,290 ±459	19.6% ±2.6 pp	22.7%	22.8%
35–64	6,631 ±681	39.6% ±3.7 pp	38.5%	38.0%
65 and older	3,239 ±447	19.3% ±2.5 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 16,745
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	8,706 ±552	52.0% ±2.4 pp	49.4%	49.5%
Female	8,039 ±540	48.0% ±2.4 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: 16,745
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	8,701 ±1,020	52.0% ±5.6 pp	61.0%	61.0%
Black or African American alone	4,636 ±634	27.7% ±3.6 pp	13.6%	12.2%
American Indian and Alaska Native alone	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.6%	0.9%
Asian alone	672 ±276	4.0% ±1.6 pp	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	9 ±14 · low precision	0.1% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	682 ±471 · low precision	4.1% ±2.8 pp · low precision	7.9%	7.1%
Two or more races	2,045 ±600	12.2% ±3.5 pp	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 16,745
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	15,583 ±803	93.1% ±2.5 pp	81.2%	80.7%
Hispanic or Latino	1,162 ±464	6.9% ±2.8 pp	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: 7,221
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	2,983 ±366	41.3% ±4.3 pp	45.3%	46.9%
Other family: male householder, no spouse present	308 ±163 · low precision	4.3% ±2.2 pp · low precision	4.9%	5.1%
Other family: female householder, no spouse present	1,025 ±254	14.2% ±3.4 pp	11.9%	12.2%
Nonfamily: householder living alone	2,506 ±397	34.7% ±5.0 pp	31.2%	28.7%
Nonfamily: householder not living alone	399 ±171	5.5% ±2.3 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 7,221
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	1,826 ±274	25.3% ±3.4 pp	28.6%	29.5%
Households without people under 18	5,395 ±573	74.7% ±6.3 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 7,221
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	2,506 ±397	34.7% ±5.0 pp	31.2%	28.7%
Two-person households	2,641 ±398	36.6% ±5.0 pp	32.3%	33.8%
Three-person households	753 ±187	10.4% ±2.5 pp	14.7%	15.3%
Four-person households	768 ±196	10.6% ±2.6 pp	12.6%	12.6%
Five-person households	366 ±168	5.1% ±2.3 pp	5.8%	5.9%
Six-person households	109 ±83 · low precision	1.5% ±1.2 pp · low precision	2.1%	2.2%
Seven or more people	78 ±70 · low precision	1.1% ±1.0 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: 16,745
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	15,564 ±730	92.9% ±1.5 pp	85.3%	85.9%
Foreign born	1,181 ±388	7.1% ±2.3 pp	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 16,004
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	14,822 ±815	92.6% ±2.3 pp	76.0%	77.7%
Spanish	599 ±294	3.7% ±1.8 pp	14.0%	13.6%
French, Haitian, or Cajun	61 ±75 · low precision	0.4% ±0.5 pp · low precision	0.3%	0.7%
German or other West Germanic	69 ±54 · low precision	0.4% ±0.3 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	0 ±20 · low precision	0.0% ±0.1 pp · low precision	2.5%	0.7%
Other Indo-European	37 ±48 · low precision	0.2% ±0.3 pp · low precision	2.6%	2.0%
Korean	32 ±53 · low precision	0.2% ±0.3 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.9%	1.1%
Vietnamese	62 ±99 · low precision	0.4% ±0.6 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	223 ±176 · low precision	1.4% ±1.1 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	48 ±58 · low precision	0.3% ±0.4 pp · low precision	1.0%	1.1%
Arabic	35 ±74 · low precision	0.2% ±0.5 pp · low precision	0.6%	0.5%
Other and unspecified	16 ±26 · low precision	0.1% ±0.2 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: 12,045
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	858 ±307	7.1% ±2.5 pp	9.5%	10.4%
High school graduate or equivalency	2,862 ±433	23.8% ±3.3 pp	25.1%	26.0%
Some college, no degree	2,541 ±399	21.1% ±3.1 pp	19.2%	19.1%
Associate’s degree	1,609 ±322	13.4% ±2.6 pp	8.3%	8.8%
Bachelor’s degree	2,360 ±458	19.6% ±3.6 pp	22.6%	21.6%
Graduate or professional degree	1,815 ±373	15.1% ±3.0 pp	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: 16,617
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	14,645 ±735	88.1% ±2.1 pp	88.9%	87.7%
Moved within same county	1,298 ±516	7.8% ±3.1 pp	6.4%	6.3%
Moved from a different county in the same state	235 ±120 · low precision	1.4% ±0.7 pp · low precision	2.4%	3.1%
Moved from a different state	388 ±243 · low precision	2.3% ±1.5 pp · low precision	1.6%	2.3%
Moved from abroad	51 ±43 · low precision	0.3% ±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

2.6% of Fairview Heights residents (±1.2 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 88.7% 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	Fairview Heights	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	2.6% ±1.2 pp	6.9%	8.4%	Lower
Households with a broadband subscription Households	88.7% ±8.1 pp	90.8%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	11.1% ±2.2 pp	4.8%	6.2%	Higher

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 Fairview Heights . 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 Fairview Heights housing and cost context or return to the city profile.