New Lenox, Illinois demographics

New Lenox, IL demographics: median age 36.8; 47.6% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · New Lenox village, Illinois · Incorporated village · GEOID 1752584. The survey estimates a population of 28,006 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in New Lenox is 36.8 years, with a 90% margin of error of 1.5 years. There are 9,134 households (±334). 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 ±1.5	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 28,006
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	8,399 ±712	30.0% ±2.5 pp	21.8%	22.0%
18–34	4,791 ±520	17.1% ±1.8 pp	22.7%	22.8%
35–64	11,572 ±727	41.3% ±2.6 pp	38.5%	38.0%
65 and older	3,244 ±335	11.6% ±1.2 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 28,006
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	14,375 ±445	51.3% ±1.5 pp	49.4%	49.5%
Female	13,631 ±434	48.7% ±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: 28,006
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	25,358 ±689	90.5% ±2.3 pp	61.0%	61.0%
Black or African American alone	180 ±168 · low precision	0.6% ±0.6 pp · low precision	13.6%	12.2%
American Indian and Alaska Native alone	0 ±24 · low precision	0.0% ±0.1 pp · low precision	0.6%	0.9%
Asian alone	188 ±106 · low precision	0.7% ±0.4 pp · low precision	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	5 ±9 · low precision	0.0% ±0.0 pp · low precision	0.0%	0.2%
Some other race alone	269 ±159 · low precision	1.0% ±0.6 pp · low precision	7.9%	7.1%
Two or more races	2,006 ±548	7.2% ±2.0 pp	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 28,006
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	26,339 ±609	94.0% ±1.9 pp	81.2%	80.7%
Hispanic or Latino	1,667 ±460	6.0% ±1.6 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: 9,134
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	6,480 ±260	70.9% ±1.2 pp	45.3%	46.9%
Other family: male householder, no spouse present	300 ±98	3.3% ±1.1 pp	4.9%	5.1%
Other family: female householder, no spouse present	716 ±207	7.8% ±2.2 pp	11.9%	12.2%
Nonfamily: householder living alone	1,405 ±236	15.4% ±2.5 pp	31.2%	28.7%
Nonfamily: householder not living alone	233 ±105	2.6% ±1.1 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 9,134
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	4,128 ±238	45.2% ±2.0 pp	28.6%	29.5%
Households without people under 18	5,006 ±426	54.8% ±4.2 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 9,134
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	1,405 ±236	15.4% ±2.5 pp	31.2%	28.7%
Two-person households	2,787 ±307	30.5% ±3.2 pp	32.3%	33.8%
Three-person households	1,605 ±287	17.6% ±3.1 pp	14.7%	15.3%
Four-person households	1,841 ±298	20.2% ±3.2 pp	12.6%	12.6%
Five-person households	1,104 ±235	12.1% ±2.5 pp	5.8%	5.9%
Six-person households	332 ±168 · low precision	3.6% ±1.8 pp · low precision	2.1%	2.2%
Seven or more people	60 ±55 · low precision	0.7% ±0.6 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: 28,006
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	27,306 ±328	97.5% ±0.6 pp	85.3%	85.9%
Foreign born	700 ±228	2.5% ±0.8 pp	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 25,803
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	24,768 ±460	96.0% ±0.6 pp	76.0%	77.7%
Spanish	275 ±147 · low precision	1.1% ±0.6 pp · low precision	14.0%	13.6%
French, Haitian, or Cajun	23 ±26 · low precision	0.1% ±0.1 pp · low precision	0.3%	0.7%
German or other West Germanic	46 ±45 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	249 ±119	1.0% ±0.5 pp	2.5%	0.7%
Other Indo-European	268 ±236 · low precision	1.0% ±0.9 pp · low precision	2.6%	2.0%
Korean	20 ±32 · low precision	0.1% ±0.1 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	0 ±24 · low precision	0.0% ±0.1 pp · low precision	0.9%	1.1%
Vietnamese	0 ±24 · low precision	0.0% ±0.1 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	15 ±25 · low precision	0.1% ±0.1 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	30 ±27 · low precision	0.1% ±0.1 pp · low precision	1.0%	1.1%
Arabic	91 ±74 · low precision	0.4% ±0.3 pp · low precision	0.6%	0.5%
Other and unspecified	18 ±37 · 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: 17,518
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	279 ±111	1.6% ±0.6 pp	9.5%	10.4%
High school graduate or equivalency	3,546 ±419	20.2% ±2.3 pp	25.1%	26.0%
Some college, no degree	3,431 ±384	19.6% ±2.1 pp	19.2%	19.1%
Associate’s degree	1,919 ±321	11.0% ±1.8 pp	8.3%	8.8%
Bachelor’s degree	5,203 ±445	29.7% ±2.4 pp	22.6%	21.6%
Graduate or professional degree	3,140 ±372	17.9% ±2.1 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: 27,547
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	26,176 ±420	95.0% ±0.9 pp	88.9%	87.7%
Moved within same county	664 ±222	2.4% ±0.8 pp	6.4%	6.3%
Moved from a different county in the same state	481 ±176	1.7% ±0.6 pp	2.4%	3.1%
Moved from a different state	151 ±123 · low precision	0.5% ±0.4 pp · low precision	1.6%	2.3%
Moved from abroad	75 ±96 · 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

1.6% of New Lenox residents (±0.6 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 96.1% 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	New Lenox	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	1.6% ±0.6 pp	6.9%	8.4%	Lower
Households with a broadband subscription Households	96.1% ±1.4 pp	90.8%	91.0%	Higher
Veterans Civilian population age 18 and older	4.3% ±1.0 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 New Lenox . 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 New Lenox housing and cost context or return to the city profile.