Northlake, Illinois demographics

Northlake, IL demographics: median age 41.9; 14.9% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Northlake city, Illinois · Incorporated city · GEOID 1753871. The survey estimates a population of 12,513 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Northlake is 41.9 years, with a 90% margin of error of 3.8 years. There are 4,277 households (±261). 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	41.9 ±3.8	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 12,513
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	2,425 ±364	19.4% ±2.9 pp	21.8%	22.0%
18–34	2,710 ±413	21.7% ±3.3 pp	22.7%	22.8%
35–64	5,007 ±532	40.0% ±4.3 pp	38.5%	38.0%
65 and older	2,371 ±333	18.9% ±2.7 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 12,513
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	6,181 ±298	49.4% ±2.4 pp	49.4%	49.5%
Female	6,332 ±300	50.6% ±2.4 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: 12,513
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	4,166 ±662	33.3% ±5.3 pp	61.0%	61.0%
Black or African American alone	492 ±186	3.9% ±1.5 pp	13.6%	12.2%
American Indian and Alaska Native alone	42 ±109 · low precision	0.3% ±0.9 pp · low precision	0.6%	0.9%
Asian alone	387 ±257 · low precision	3.1% ±2.1 pp · low precision	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±20 · low precision	0.0% ±0.2 pp · low precision	0.0%	0.2%
Some other race alone	4,280 ±908	34.2% ±7.3 pp	7.9%	7.1%
Two or more races	3,146 ±641	25.1% ±5.1 pp	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 12,513
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	4,748 ±648	37.9% ±5.2 pp	81.2%	80.7%
Hispanic or Latino	7,765 ±642	62.1% ±5.1 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: 4,277
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	1,941 ±242	45.4% ±4.9 pp	45.3%	46.9%
Other family: male householder, no spouse present	382 ±160	8.9% ±3.7 pp	4.9%	5.1%
Other family: female householder, no spouse present	697 ±215	16.3% ±4.9 pp	11.9%	12.2%
Nonfamily: householder living alone	977 ±263	22.8% ±6.0 pp	31.2%	28.7%
Nonfamily: householder not living alone	280 ±145 · low precision	6.5% ±3.4 pp · low precision	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 4,277
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	1,154 ±169	27.0% ±3.6 pp	28.6%	29.5%
Households without people under 18	3,123 ±333	73.0% ±6.4 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 4,277
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	977 ±263	22.8% ±6.0 pp	31.2%	28.7%
Two-person households	1,291 ±291	30.2% ±6.5 pp	32.3%	33.8%
Three-person households	651 ±232	15.2% ±5.3 pp	14.7%	15.3%
Four-person households	643 ±160	15.0% ±3.6 pp	12.6%	12.6%
Five-person households	440 ±155	10.3% ±3.6 pp	5.8%	5.9%
Six-person households	246 ±104	5.8% ±2.4 pp	2.1%	2.2%
Seven or more people	29 ±33 · low precision	0.7% ±0.8 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: 12,513
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	8,743 ±419	69.9% ±3.3 pp	85.3%	85.9%
Foreign born	3,770 ±418	30.1% ±3.3 pp	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 12,100
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	4,938 ±492	40.8% ±4.0 pp	76.0%	77.7%
Spanish	6,290 ±595	52.0% ±4.9 pp	14.0%	13.6%
French, Haitian, or Cajun	0 ±20 · low precision	0.0% ±0.2 pp · low precision	0.3%	0.7%
German or other West Germanic	0 ±20 · low precision	0.0% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	485 ±290 · low precision	4.0% ±2.4 pp · low precision	2.5%	0.7%
Other Indo-European	49 ±52 · low precision	0.4% ±0.4 pp · low precision	2.6%	2.0%
Korean	6 ±11 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	25 ±48 · low precision	0.2% ±0.4 pp · low precision	0.9%	1.1%
Vietnamese	148 ±201 · low precision	1.2% ±1.7 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	102 ±63 · low precision	0.8% ±0.5 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	46 ±54 · low precision	0.4% ±0.4 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	11 ±18 · 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: 9,013
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	2,359 ±416	26.2% ±4.5 pp	9.5%	10.4%
High school graduate or equivalency	3,123 ±389	34.6% ±4.1 pp	25.1%	26.0%
Some college, no degree	1,455 ±289	16.1% ±3.1 pp	19.2%	19.1%
Associate’s degree	736 ±252	8.2% ±2.8 pp	8.3%	8.8%
Bachelor’s degree	1,005 ±240	11.2% ±2.6 pp	22.6%	21.6%
Graduate or professional degree	335 ±123	3.7% ±1.4 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: 12,475
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	11,750 ±261	94.2% ±2.1 pp	88.9%	87.7%
Moved within same county	429 ±207	3.4% ±1.7 pp	6.4%	6.3%
Moved from a different county in the same state	139 ±116 · low precision	1.1% ±0.9 pp · low precision	2.4%	3.1%
Moved from a different state	86 ±68 · low precision	0.7% ±0.5 pp · low precision	1.6%	2.3%
Moved from abroad	71 ±50 · low precision	0.6% ±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

10.9% of Northlake residents (±2.6 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 86.4% 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	Northlake	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	10.9% ±2.6 pp	6.9%	8.4%	Higher
Households with a broadband subscription Households	86.4% ±3.4 pp	90.8%	91.0%	Lower
Veterans Civilian population age 18 and older	4.2% ±1.3 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 Northlake . 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 Northlake housing and cost context or return to the city profile.