Westchester, Illinois demographics

Westchester, IL demographics: median age 51.6; 43.6% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Westchester village, Illinois · Incorporated village · GEOID 1780047. The survey estimates a population of 16,436 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Westchester is 51.6 years, with a 90% margin of error of 3.3 years. There are 6,908 households (±354). 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	51.6 ±3.3	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 16,436
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	2,781 ±399	16.9% ±2.4 pp	21.8%	22.0%
18–34	2,426 ±420	14.8% ±2.6 pp	22.7%	22.8%
35–64	6,456 ±550	39.3% ±3.3 pp	38.5%	38.0%
65 and older	4,773 ±559	29.0% ±3.4 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 16,436
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	7,495 ±374	45.6% ±2.3 pp	49.4%	49.5%
Female	8,941 ±367	54.4% ±2.2 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: 16,436
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	8,466 ±819	51.5% ±5.0 pp	61.0%	61.0%
Black or African American alone	3,325 ±576	20.2% ±3.5 pp	13.6%	12.2%
American Indian and Alaska Native alone	35 ±61 · low precision	0.2% ±0.4 pp · low precision	0.6%	0.9%
Asian alone	617 ±251	3.8% ±1.5 pp	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	2,302 ±585	14.0% ±3.6 pp	7.9%	7.1%
Two or more races	1,691 ±446	10.3% ±2.7 pp	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 16,436
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	12,065 ±545	73.4% ±3.3 pp	81.2%	80.7%
Hispanic or Latino	4,371 ±542	26.6% ±3.3 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: 6,908
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	3,488 ±311	50.5% ±3.7 pp	45.3%	46.9%
Other family: male householder, no spouse present	271 ±102	3.9% ±1.5 pp	4.9%	5.1%
Other family: female householder, no spouse present	973 ±258	14.1% ±3.7 pp	11.9%	12.2%
Nonfamily: householder living alone	1,980 ±389	28.7% ±5.4 pp	31.2%	28.7%
Nonfamily: householder not living alone	196 ±83	2.8% ±1.2 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 6,908
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	1,506 ±194	21.8% ±2.6 pp	28.6%	29.5%
Households without people under 18	5,402 ±467	78.2% ±5.4 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 6,908
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	1,980 ±389	28.7% ±5.4 pp	31.2%	28.7%
Two-person households	2,702 ±327	39.1% ±4.3 pp	32.3%	33.8%
Three-person households	1,164 ±216	16.9% ±3.0 pp	14.7%	15.3%
Four-person households	546 ±134	7.9% ±1.9 pp	12.6%	12.6%
Five-person households	276 ±108	4.0% ±1.5 pp	5.8%	5.9%
Six-person households	121 ±83 · low precision	1.8% ±1.2 pp · low precision	2.1%	2.2%
Seven or more people	119 ±64 · low precision	1.7% ±0.9 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: 16,436
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	13,724 ±463	83.5% ±2.8 pp	85.3%	85.9%
Foreign born	2,712 ±465	16.5% ±2.8 pp	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 15,748
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	10,786 ±649	68.5% ±4.0 pp	76.0%	77.7%
Spanish	3,237 ±524	20.6% ±3.3 pp	14.0%	13.6%
French, Haitian, or Cajun	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.7%
German or other West Germanic	71 ±77 · low precision	0.5% ±0.5 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	393 ±205 · low precision	2.5% ±1.3 pp · low precision	2.5%	0.7%
Other Indo-European	478 ±235	3.0% ±1.5 pp	2.6%	2.0%
Korean	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	39 ±57 · low precision	0.2% ±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	278 ±153 · low precision	1.8% ±1.0 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	100 ±78 · low precision	0.6% ±0.5 pp · low precision	1.0%	1.1%
Arabic	76 ±84 · low precision	0.5% ±0.5 pp · low precision	0.6%	0.5%
Other and unspecified	290 ±224 · low precision	1.8% ±1.4 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: 12,545
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	844 ±198	6.7% ±1.6 pp	9.5%	10.4%
High school graduate or equivalency	2,715 ±422	21.6% ±3.3 pp	25.1%	26.0%
Some college, no degree	2,477 ±389	19.7% ±3.0 pp	19.2%	19.1%
Associate’s degree	1,039 ±233	8.3% ±1.8 pp	8.3%	8.8%
Bachelor’s degree	3,557 ±486	28.4% ±3.7 pp	22.6%	21.6%
Graduate or professional degree	1,913 ±311	15.2% ±2.4 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: 16,359
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	15,530 ±290	94.9% ±1.7 pp	88.9%	87.7%
Moved within same county	624 ±233	3.8% ±1.4 pp	6.4%	6.3%
Moved from a different county in the same state	60 ±48 · low precision	0.4% ±0.3 pp · low precision	2.4%	3.1%
Moved from a different state	145 ±135 · low precision	0.9% ±0.8 pp · low precision	1.6%	2.3%
Moved from abroad	0 ±20 · low precision	0.0% ±0.1 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

2.4% of Westchester residents (±0.9 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 90.1% 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	Westchester	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	2.4% ±0.9 pp	6.9%	8.4%	Lower
Households with a broadband subscription Households	90.1% ±6.2 pp	90.8%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	6.1% ±1.6 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 Westchester . 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 Westchester housing and cost context or return to the city profile.