Warrenville, Illinois demographics

Warrenville, IL demographics: median age 36.5; 44.9% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Warrenville city, Illinois · Incorporated city · GEOID 1778929. The survey estimates a population of 14,718 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Warrenville is 36.5 years, with a 90% margin of error of 1.9 years. There are 5,730 households (±294). 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	36.5 ±1.9	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 14,718
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	3,360 ±490	22.8% ±3.3 pp	21.8%	22.0%
18–34	3,682 ±506	25.0% ±3.4 pp	22.7%	22.8%
35–64	5,505 ±472	37.4% ±3.2 pp	38.5%	38.0%
65 and older	2,171 ±280	14.8% ±1.9 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 14,718
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	7,403 ±327	50.3% ±2.1 pp	49.4%	49.5%
Female	7,315 ±344	49.7% ±2.3 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: 14,718
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	9,455 ±778	64.2% ±5.2 pp	61.0%	61.0%
Black or African American alone	768 ±385 · low precision	5.2% ±2.6 pp · low precision	13.6%	12.2%
American Indian and Alaska Native alone	206 ±158 · low precision	1.4% ±1.1 pp · low precision	0.6%	0.9%
Asian alone	979 ±344	6.7% ±2.3 pp	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	9 ±17 · low precision	0.1% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	2,125 ±756	14.4% ±5.1 pp	7.9%	7.1%
Two or more races	1,176 ±357	8.0% ±2.4 pp	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 14,718
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	10,944 ±754	74.4% ±5.0 pp	81.2%	80.7%
Hispanic or Latino	3,774 ±723	25.6% ±4.9 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: 5,730
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	2,807 ±237	49.0% ±3.3 pp	45.3%	46.9%
Other family: male householder, no spouse present	197 ±77	3.4% ±1.3 pp	4.9%	5.1%
Other family: female householder, no spouse present	554 ±159	9.7% ±2.7 pp	11.9%	12.2%
Nonfamily: householder living alone	1,471 ±297	25.7% ±5.0 pp	31.2%	28.7%
Nonfamily: householder not living alone	701 ±188	12.2% ±3.2 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 5,730
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	1,582 ±185	27.6% ±2.9 pp	28.6%	29.5%
Households without people under 18	4,148 ±376	72.4% ±5.4 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 5,730
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	1,471 ±297	25.7% ±5.0 pp	31.2%	28.7%
Two-person households	2,237 ±305	39.0% ±4.9 pp	32.3%	33.8%
Three-person households	779 ±167	13.6% ±2.8 pp	14.7%	15.3%
Four-person households	688 ±136	12.0% ±2.3 pp	12.6%	12.6%
Five-person households	392 ±117	6.8% ±2.0 pp	5.8%	5.9%
Six-person households	60 ±59 · low precision	1.0% ±1.0 pp · low precision	2.1%	2.2%
Seven or more people	103 ±93 · low precision	1.8% ±1.6 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: 14,718
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	11,919 ±474	81.0% ±3.1 pp	85.3%	85.9%
Foreign born	2,799 ±410	19.0% ±2.8 pp	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 13,891
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	9,588 ±763	69.0% ±5.3 pp	76.0%	77.7%
Spanish	2,920 ±630	21.0% ±4.5 pp	14.0%	13.6%
French, Haitian, or Cajun	29 ±49 · low precision	0.2% ±0.4 pp · low precision	0.3%	0.7%
German or other West Germanic	30 ±24 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	168 ±100 · low precision	1.2% ±0.7 pp · low precision	2.5%	0.7%
Other Indo-European	567 ±332 · low precision	4.1% ±2.4 pp · low precision	2.6%	2.0%
Korean	31 ±28 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	85 ±61 · low precision	0.6% ±0.4 pp · low precision	0.9%	1.1%
Vietnamese	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	83 ±61 · low precision	0.6% ±0.4 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	169 ±110 · low precision	1.2% ±0.8 pp · low precision	1.0%	1.1%
Arabic	45 ±43 · low precision	0.3% ±0.3 pp · low precision	0.6%	0.5%
Other and unspecified	176 ±137 · low precision	1.3% ±1.0 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: 10,290
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	1,451 ±416	14.1% ±4.0 pp	9.5%	10.4%
High school graduate or equivalency	1,853 ±309	18.0% ±2.9 pp	25.1%	26.0%
Some college, no degree	1,661 ±284	16.1% ±2.6 pp	19.2%	19.1%
Associate’s degree	701 ±191	6.8% ±1.8 pp	8.3%	8.8%
Bachelor’s degree	2,774 ±313	27.0% ±2.7 pp	22.6%	21.6%
Graduate or professional degree	1,850 ±274	18.0% ±2.5 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: 14,488
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	13,125 ±343	90.6% ±1.9 pp	88.9%	87.7%
Moved within same county	859 ±260	5.9% ±1.8 pp	6.4%	6.3%
Moved from a different county in the same state	282 ±113	1.9% ±0.8 pp	2.4%	3.1%
Moved from a different state	160 ±135 · low precision	1.1% ±0.9 pp · low precision	1.6%	2.3%
Moved from abroad	62 ±55 · low precision	0.4% ±0.4 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

5.3% of Warrenville residents (±1.6 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 94.9% 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	Warrenville	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	5.3% ±1.6 pp	6.9%	8.4%	Not statistically different
Households with a broadband subscription Households	94.9% ±1.7 pp	90.8%	91.0%	Higher
Veterans Civilian population age 18 and older	4.9% ±1.5 pp	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 Warrenville . 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 Warrenville housing and cost context or return to the city profile.