Zion, Illinois demographics

Zion, IL demographics: median age 32.3; 15.1% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Zion city, Illinois · Incorporated city · GEOID 1784220. The survey estimates a population of 24,600 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Zion is 32.3 years, with a 90% margin of error of 2.0 years. There are 8,813 households (±538). 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	32.3 ±2.0	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 24,600
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	7,004 ±742	28.5% ±3.0 pp	21.8%	22.0%
18–34	6,144 ±612	25.0% ±2.5 pp	22.7%	22.8%
35–64	8,655 ±751	35.2% ±3.1 pp	38.5%	38.0%
65 and older	2,797 ±354	11.4% ±1.4 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 24,600
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	11,931 ±514	48.5% ±2.1 pp	49.4%	49.5%
Female	12,669 ±512	51.5% ±2.1 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: 24,600
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	7,912 ±963	32.2% ±3.9 pp	61.0%	61.0%
Black or African American alone	6,165 ±881	25.1% ±3.6 pp	13.6%	12.2%
American Indian and Alaska Native alone	545 ±271	2.2% ±1.1 pp	0.6%	0.9%
Asian alone	728 ±260	3.0% ±1.1 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	4,047 ±738	16.5% ±3.0 pp	7.9%	7.1%
Two or more races	5,203 ±1,043	21.2% ±4.2 pp	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 24,600
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	13,840 ±1,094	56.3% ±4.4 pp	81.2%	80.7%
Hispanic or Latino	10,760 ±1,093	43.7% ±4.4 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: 8,813
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	3,405 ±357	38.6% ±3.3 pp	45.3%	46.9%
Other family: male householder, no spouse present	635 ±227	7.2% ±2.5 pp	4.9%	5.1%
Other family: female householder, no spouse present	1,745 ±324	19.8% ±3.5 pp	11.9%	12.2%
Nonfamily: householder living alone	2,674 ±468	30.3% ±5.0 pp	31.2%	28.7%
Nonfamily: householder not living alone	354 ±192 · low precision	4.0% ±2.2 pp · low precision	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 8,813
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	3,339 ±274	37.9% ±2.1 pp	28.6%	29.5%
Households without people under 18	5,474 ±701	62.1% ±7.0 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 8,813
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	2,674 ±468	30.3% ±5.0 pp	31.2%	28.7%
Two-person households	2,084 ±380	23.6% ±4.1 pp	32.3%	33.8%
Three-person households	1,678 ±288	19.0% ±3.1 pp	14.7%	15.3%
Four-person households	989 ±213	11.2% ±2.3 pp	12.6%	12.6%
Five-person households	650 ±197	7.4% ±2.2 pp	5.8%	5.9%
Six-person households	491 ±194	5.6% ±2.2 pp	2.1%	2.2%
Seven or more people	247 ±150 · low precision	2.8% ±1.7 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: 24,600
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	19,884 ±644	80.8% ±2.6 pp	85.3%	85.9%
Foreign born	4,716 ±642	19.2% ±2.6 pp	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 22,761
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	14,769 ±1,093	64.9% ±4.7 pp	76.0%	77.7%
Spanish	7,137 ±1,016	31.4% ±4.4 pp	14.0%	13.6%
French, Haitian, or Cajun	50 ±46 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.7%
German or other West Germanic	26 ±36 · low precision	0.1% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	65 ±57 · low precision	0.3% ±0.3 pp · low precision	2.5%	0.7%
Other Indo-European	65 ±83 · low precision	0.3% ±0.4 pp · low precision	2.6%	2.0%
Korean	0 ±24 · low precision	0.0% ±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	16 ±21 · low precision	0.1% ±0.1 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	455 ±186	2.0% ±0.8 pp	0.7%	0.6%
Other Asian and Pacific Island	24 ±33 · low precision	0.1% ±0.1 pp · low precision	1.0%	1.1%
Arabic	25 ±39 · low precision	0.1% ±0.2 pp · low precision	0.6%	0.5%
Other and unspecified	129 ±131 · low precision	0.6% ±0.6 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: 15,074
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	2,401 ±456	15.9% ±2.9 pp	9.5%	10.4%
High school graduate or equivalency	5,405 ±483	35.9% ±2.6 pp	25.1%	26.0%
Some college, no degree	3,907 ±526	25.9% ±3.2 pp	19.2%	19.1%
Associate’s degree	1,084 ±248	7.2% ±1.6 pp	8.3%	8.8%
Bachelor’s degree	1,534 ±310	10.2% ±2.0 pp	22.6%	21.6%
Graduate or professional degree	743 ±187	4.9% ±1.2 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: 24,280
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	21,355 ±894	88.0% ±3.6 pp	88.9%	87.7%
Moved within same county	1,784 ±683	7.3% ±2.8 pp	6.4%	6.3%
Moved from a different county in the same state	543 ±290 · low precision	2.2% ±1.2 pp · low precision	2.4%	3.1%
Moved from a different state	431 ±226 · low precision	1.8% ±0.9 pp · low precision	1.6%	2.3%
Moved from abroad	167 ±123 · low precision	0.7% ±0.5 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

11.9% of Zion residents (±2.1 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 90.5% 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	Zion	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	11.9% ±2.1 pp	6.9%	8.4%	Higher
Households with a broadband subscription Households	90.5% ±2.4 pp	90.8%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	7.6% ±1.4 pp	4.8%	6.2%	Higher

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 Zion . 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 Zion housing and cost context or return to the city profile.