Chatham, Illinois demographics

Chatham, IL demographics: median age 35.4; 53.2% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Chatham village, Illinois · Incorporated village · GEOID 1712684. The survey estimates a population of 14,639 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Chatham is 35.4 years, with a 90% margin of error of 2.2 years. There are 5,624 households (±283). 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	35.4 ±2.2	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 14,639
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	4,607 ±531	31.5% ±3.5 pp	21.8%	22.0%
18–34	2,618 ±454	17.9% ±3.0 pp	22.7%	22.8%
35–64	5,666 ±529	38.7% ±3.4 pp	38.5%	38.0%
65 and older	1,748 ±271	11.9% ±1.8 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 14,639
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	6,487 ±366	44.3% ±2.0 pp	49.4%	49.5%
Female	8,152 ±484	55.7% ±2.7 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: 14,639
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	12,982 ±638	88.7% ±3.2 pp	61.0%	61.0%
Black or African American alone	396 ±304 · low precision	2.7% ±2.1 pp · low precision	13.6%	12.2%
American Indian and Alaska Native alone	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.6%	0.9%
Asian alone	453 ±273 · low precision	3.1% ±1.9 pp · low precision	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	134 ±141 · low precision	0.9% ±1.0 pp · low precision	7.9%	7.1%
Two or more races	674 ±347 · low precision	4.6% ±2.4 pp · low precision	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 14,639
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	14,072 ±522	96.1% ±1.6 pp	81.2%	80.7%
Hispanic or Latino	567 ±294 · low precision	3.9% ±2.0 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: 5,624
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	3,195 ±236	56.8% ±3.1 pp	45.3%	46.9%
Other family: male householder, no spouse present	43 ±42 · low precision	0.8% ±0.7 pp · low precision	4.9%	5.1%
Other family: female householder, no spouse present	393 ±132	7.0% ±2.3 pp	11.9%	12.2%
Nonfamily: householder living alone	1,622 ±333	28.8% ±5.7 pp	31.2%	28.7%
Nonfamily: householder not living alone	371 ±194 · low precision	6.6% ±3.4 pp · low precision	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 5,624
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	2,128 ±226	37.8% ±3.5 pp	28.6%	29.5%
Households without people under 18	3,496 ±381	62.2% ±6.0 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 5,624
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	1,622 ±333	28.8% ±5.7 pp	31.2%	28.7%
Two-person households	1,852 ±338	32.9% ±5.8 pp	32.3%	33.8%
Three-person households	780 ±225	13.9% ±3.9 pp	14.7%	15.3%
Four-person households	689 ±155	12.3% ±2.7 pp	12.6%	12.6%
Five-person households	416 ±207	7.4% ±3.7 pp	5.8%	5.9%
Six-person households	210 ±104	3.7% ±1.8 pp	2.1%	2.2%
Seven or more people	55 ±70 · low precision	1.0% ±1.2 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: 14,639
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	14,167 ±557	96.8% ±2.0 pp	85.3%	85.9%
Foreign born	472 ±275 · low precision	3.2% ±1.9 pp · low precision	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 13,408
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	12,643 ±559	94.3% ±2.4 pp	76.0%	77.7%
Spanish	138 ±141 · low precision	1.0% ±1.1 pp · low precision	14.0%	13.6%
French, Haitian, or Cajun	16 ±26 · low precision	0.1% ±0.2 pp · low precision	0.3%	0.7%
German or other West Germanic	74 ±87 · low precision	0.6% ±0.6 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	11 ±19 · low precision	0.1% ±0.1 pp · low precision	2.5%	0.7%
Other Indo-European	369 ±269 · low precision	2.8% ±2.0 pp · low precision	2.6%	2.0%
Korean	63 ±100 · low precision	0.5% ±0.7 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	79 ±57 · low precision	0.6% ±0.4 pp · low precision	0.9%	1.1%
Vietnamese	15 ±24 · low precision	0.1% ±0.2 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	0 ±20 · low precision	0.0% ±0.1 pp · low precision	1.0%	1.1%
Arabic	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.6%	0.5%
Other and unspecified	0 ±20 · low precision	0.0% ±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: 9,048
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	107 ±88 · low precision	1.2% ±1.0 pp · low precision	9.5%	10.4%
High school graduate or equivalency	1,249 ±254	13.8% ±2.7 pp	25.1%	26.0%
Some college, no degree	1,859 ±351	20.5% ±3.7 pp	19.2%	19.1%
Associate’s degree	1,015 ±246	11.2% ±2.7 pp	8.3%	8.8%
Bachelor’s degree	2,841 ±381	31.4% ±3.9 pp	22.6%	21.6%
Graduate or professional degree	1,977 ±351	21.9% ±3.7 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: 14,315
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	13,331 ±664	93.1% ±3.3 pp	88.9%	87.7%
Moved within same county	768 ±345	5.4% ±2.4 pp	6.4%	6.3%
Moved from a different county in the same state	71 ±57 · low precision	0.5% ±0.4 pp · low precision	2.4%	3.1%
Moved from a different state	145 ±118 · low precision	1.0% ±0.8 pp · low precision	1.6%	2.3%
Moved from abroad	0 ±20 · low precision	0.0% ±0.1 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

3.2% of Chatham residents (±1.3 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 92.3% 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	Chatham	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	3.2% ±1.3 pp	6.9%	8.4%	Lower
Households with a broadband subscription Households	92.3% ±1.8 pp	90.8%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	5.6% ±1.6 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 Chatham . 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 Chatham housing and cost context or return to the city profile.