Lake in the Hills, Illinois demographics

Lake in the Hills, IL demographics: median age 36.8; 35.8% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Lake in the Hills village, Illinois · Incorporated village · GEOID 1741183. The survey estimates a population of 28,800 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Lake in the Hills is 36.8 years, with a 90% margin of error of 0.8 years. There are 9,692 households (±296). 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	36.8 ±0.8	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 28,800
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	7,953 ±605	27.6% ±2.1 pp	21.8%	22.0%
18–34	5,457 ±554	18.9% ±1.9 pp	22.7%	22.8%
35–64	12,506 ±716	43.4% ±2.5 pp	38.5%	38.0%
65 and older	2,884 ±313	10.0% ±1.1 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 28,800
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	14,268 ±448	49.5% ±1.6 pp	49.4%	49.5%
Female	14,532 ±445	50.5% ±1.5 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: 28,800
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	20,425 ±876	70.9% ±3.0 pp	61.0%	61.0%
Black or African American alone	793 ±570 · low precision	2.8% ±2.0 pp · low precision	13.6%	12.2%
American Indian and Alaska Native alone	116 ±97 · low precision	0.4% ±0.3 pp · low precision	0.6%	0.9%
Asian alone	2,064 ±431	7.2% ±1.5 pp	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±24 · low precision	0.0% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	1,776 ±581	6.2% ±2.0 pp	7.9%	7.1%
Two or more races	3,626 ±632	12.6% ±2.2 pp	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 28,800
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	22,948 ±815	79.7% ±2.8 pp	81.2%	80.7%
Hispanic or Latino	5,852 ±818	20.3% ±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: 9,692
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	6,136 ±333	63.3% ±2.8 pp	45.3%	46.9%
Other family: male householder, no spouse present	626 ±214	6.5% ±2.2 pp	4.9%	5.1%
Other family: female householder, no spouse present	999 ±235	10.3% ±2.4 pp	11.9%	12.2%
Nonfamily: householder living alone	1,564 ±245	16.1% ±2.5 pp	31.2%	28.7%
Nonfamily: householder not living alone	367 ±124	3.8% ±1.3 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 9,692
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	4,528 ±255	46.7% ±2.2 pp	28.6%	29.5%
Households without people under 18	5,164 ±372	53.3% ±3.5 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 9,692
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	1,564 ±245	16.1% ±2.5 pp	31.2%	28.7%
Two-person households	2,561 ±302	26.4% ±3.0 pp	32.3%	33.8%
Three-person households	2,084 ±262	21.5% ±2.6 pp	14.7%	15.3%
Four-person households	2,082 ±324	21.5% ±3.3 pp	12.6%	12.6%
Five-person households	949 ±200	9.8% ±2.0 pp	5.8%	5.9%
Six-person households	284 ±110	2.9% ±1.1 pp	2.1%	2.2%
Seven or more people	168 ±102 · low precision	1.7% ±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: 28,800
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	24,555 ±491	85.3% ±1.7 pp	85.3%	85.9%
Foreign born	4,245 ±495	14.7% ±1.7 pp	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 26,821
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	20,723 ±784	77.3% ±2.8 pp	76.0%	77.7%
Spanish	3,493 ±624	13.0% ±2.3 pp	14.0%	13.6%
French, Haitian, or Cajun	5 ±12 · low precision	0.0% ±0.0 pp · low precision	0.3%	0.7%
German or other West Germanic	22 ±25 · low precision	0.1% ±0.1 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	982 ±309	3.7% ±1.2 pp	2.5%	0.7%
Other Indo-European	630 ±276	2.3% ±1.0 pp	2.6%	2.0%
Korean	70 ±72 · low precision	0.3% ±0.3 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	30 ±45 · low precision	0.1% ±0.2 pp · low precision	0.9%	1.1%
Vietnamese	13 ±22 · low precision	0.0% ±0.1 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	638 ±228	2.4% ±0.8 pp	0.7%	0.6%
Other Asian and Pacific Island	124 ±83 · low precision	0.5% ±0.3 pp · low precision	1.0%	1.1%
Arabic	49 ±52 · low precision	0.2% ±0.2 pp · low precision	0.6%	0.5%
Other and unspecified	42 ±55 · low precision	0.2% ±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: 18,360
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	930 ±225	5.1% ±1.2 pp	9.5%	10.4%
High school graduate or equivalency	4,554 ±537	24.8% ±2.9 pp	25.1%	26.0%
Some college, no degree	4,117 ±407	22.4% ±2.1 pp	19.2%	19.1%
Associate’s degree	2,193 ±355	11.9% ±1.9 pp	8.3%	8.8%
Bachelor’s degree	4,553 ±440	24.8% ±2.3 pp	22.6%	21.6%
Graduate or professional degree	2,013 ±292	11.0% ±1.6 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: 28,250
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	26,821 ±454	94.9% ±1.5 pp	88.9%	87.7%
Moved within same county	516 ±284 · low precision	1.8% ±1.0 pp · low precision	6.4%	6.3%
Moved from a different county in the same state	649 ±299	2.3% ±1.1 pp	2.4%	3.1%
Moved from a different state	240 ±218 · low precision	0.8% ±0.8 pp · low precision	1.6%	2.3%
Moved from abroad	24 ±44 · low precision	0.1% ±0.2 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

4.2% of Lake in the Hills residents (±1.1 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 97.2% 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	Lake in the Hills	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	4.2% ±1.1 pp	6.9%	8.4%	Lower
Households with a broadband subscription Households	97.2% ±0.4 pp	90.8%	91.0%	Higher
Veterans Civilian population age 18 and older	2.9% ±0.7 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 Lake in the Hills . 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 Lake in the Hills housing and cost context or return to the city profile.