Winnetka, Illinois demographics

Winnetka, IL demographics: median age 41.5; 86.7% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Winnetka village, Illinois · Incorporated village · GEOID 1782530. The survey estimates a population of 12,484 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Winnetka is 41.5 years, with a 90% margin of error of 2.4 years. There are 4,172 households (±171). 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	41.5 ±2.4	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 12,484
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	4,307 ±387	34.5% ±3.1 pp	21.8%	22.0%
18–34	949 ±197	7.6% ±1.6 pp	22.7%	22.8%
35–64	5,246 ±416	42.0% ±3.3 pp	38.5%	38.0%
65 and older	1,982 ±282	15.9% ±2.3 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 12,484
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	6,423 ±237	51.4% ±1.9 pp	49.4%	49.5%
Female	6,061 ±232	48.6% ±1.9 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: 12,484
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	11,142 ±366	89.3% ±2.9 pp	61.0%	61.0%
Black or African American alone	41 ±60 · low precision	0.3% ±0.5 pp · low precision	13.6%	12.2%
American Indian and Alaska Native alone	0 ±20 · low precision	0.0% ±0.2 pp · low precision	0.6%	0.9%
Asian alone	319 ±129	2.6% ±1.0 pp	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	8 ±14 · low precision	0.1% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	124 ±149 · low precision	1.0% ±1.2 pp · low precision	7.9%	7.1%
Two or more races	850 ±297	6.8% ±2.4 pp	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 12,484
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	12,035 ±244	96.4% ±1.9 pp	81.2%	80.7%
Hispanic or Latino	449 ±242 · low precision	3.6% ±1.9 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: 4,172
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	3,257 ±138	78.1% ±0.8 pp	45.3%	46.9%
Other family: male householder, no spouse present	53 ±44 · low precision	1.3% ±1.1 pp · low precision	4.9%	5.1%
Other family: female householder, no spouse present	202 ±98	4.8% ±2.3 pp	11.9%	12.2%
Nonfamily: householder living alone	632 ±146	15.1% ±3.4 pp	31.2%	28.7%
Nonfamily: householder not living alone	28 ±28 · low precision	0.7% ±0.7 pp · low precision	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 4,172
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	1,803 ±135	43.2% ±2.7 pp	28.6%	29.5%
Households without people under 18	2,369 ±258	56.8% ±5.7 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 4,172
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	632 ±146	15.1% ±3.4 pp	31.2%	28.7%
Two-person households	1,247 ±220	29.9% ±5.1 pp	32.3%	33.8%
Three-person households	810 ±175	19.4% ±4.1 pp	14.7%	15.3%
Four-person households	785 ±139	18.8% ±3.3 pp	12.6%	12.6%
Five-person households	543 ±126	13.0% ±3.0 pp	5.8%	5.9%
Six-person households	138 ±66	3.3% ±1.6 pp	2.1%	2.2%
Seven or more people	17 ±29 · low precision	0.4% ±0.7 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: 12,484
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	11,597 ±247	92.9% ±2.0 pp	85.3%	85.9%
Foreign born	887 ±247	7.1% ±2.0 pp	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 11,484
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	10,273 ±395	89.5% ±3.1 pp	76.0%	77.7%
Spanish	197 ±93	1.7% ±0.8 pp	14.0%	13.6%
French, Haitian, or Cajun	117 ±80 · low precision	1.0% ±0.7 pp · low precision	0.3%	0.7%
German or other West Germanic	62 ±47 · low precision	0.5% ±0.4 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	208 ±143 · low precision	1.8% ±1.2 pp · low precision	2.5%	0.7%
Other Indo-European	440 ±312 · low precision	3.8% ±2.7 pp · low precision	2.6%	2.0%
Korean	0 ±20 · low precision	0.0% ±0.2 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	68 ±64 · low precision	0.6% ±0.6 pp · low precision	0.9%	1.1%
Vietnamese	26 ±39 · low precision	0.2% ±0.3 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	0 ±20 · low precision	0.0% ±0.2 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	83 ±64 · low precision	0.7% ±0.6 pp · low precision	1.0%	1.1%
Arabic	0 ±20 · low precision	0.0% ±0.2 pp · low precision	0.6%	0.5%
Other and unspecified	10 ±15 · low precision	0.1% ±0.1 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: 7,730
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	68 ±110 · low precision	0.9% ±1.4 pp · low precision	9.5%	10.4%
High school graduate or equivalency	298 ±153 · low precision	3.9% ±2.0 pp · low precision	25.1%	26.0%
Some college, no degree	514 ±146	6.6% ±1.9 pp	19.2%	19.1%
Associate’s degree	151 ±88 · low precision	2.0% ±1.1 pp · low precision	8.3%	8.8%
Bachelor’s degree	2,732 ±336	35.3% ±4.1 pp	22.6%	21.6%
Graduate or professional degree	3,967 ±440	51.3% ±5.3 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: 12,394
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	11,340 ±295	91.5% ±2.3 pp	88.9%	87.7%
Moved within same county	698 ±268	5.6% ±2.2 pp	6.4%	6.3%
Moved from a different county in the same state	9 ±16 · low precision	0.1% ±0.1 pp · low precision	2.4%	3.1%
Moved from a different state	270 ±178 · low precision	2.2% ±1.4 pp · low precision	1.6%	2.3%
Moved from abroad	77 ±83 · low precision	0.6% ±0.7 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

1.6% of Winnetka residents (±1.4 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 98.0% 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	Winnetka	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	1.6% ±1.4 pp · low precision	6.9%	8.4%	Lower
Households with a broadband subscription Households	98.0% ±1.4 pp	90.8%	91.0%	Higher
Veterans Civilian population age 18 and older	3.6% ±1.2 pp	4.8%	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 Winnetka . 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 Winnetka housing and cost context or return to the city profile.