Union County, Illinois

Union County, Illinois, had an estimated population of 16,656 in 2025 across 1,071 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among Illinois's counties and nationally.

Population: 16,656; 2025 estimate
Area: 1,071 km²
Density: 16; per km²
Median income: $55,728; household, ACS 2024
Median age: 44.3; years, ACS 2024

How Illinois's counties spread

Amenities & Infrastructure

Indicator	Value	In Illinois	In the US
Households with Broadband2024	72.6%	100 / 102	3,059 / 3,144
Median Gross Rent2024	$648	96 / 102	2,928 / 3,137
Median Home Value2024	$131,700	55 / 102	2,473 / 3,139
Owner-Occupied Homes2024	77.4%	45 / 102	1,054 / 3,144
Vacant Homes2024	12.5%	32 / 102	1,802 / 3,144

Demography

Indicator	Value	In Illinois	In the US
Aged 65 and Over2024	22.9%	21 / 102	783 / 3,144
American Indian & Alaska Native2024	0.0%	62 / 102	2,461 / 3,144
Asian, non-Hispanic2024	0.6%	45 / 102	1,544 / 3,144
Average Household Size2024people	2.4	43 / 102	2,051 / 3,144
Black, non-Hispanic2024	0.9%	72 / 102	2,082 / 3,144
Foreign-Born2024	3.0%	28 / 102	1,523 / 3,144
Hispanic or Latino2024	5.5%	33 / 102	1,469 / 3,144
Median Age2024years	44.3	23 / 102	814 / 3,144
Sex Ratio2024per 1,000 males	965	77 / 102	2,275 / 3,144
Speak a Language Other Than English2024	5.6%	30 / 102	1,565 / 3,144
Under 182024	21.3%	51 / 102	1,776 / 3,144
Veterans2024	7.6%	47 / 102	1,292 / 3,144
White, non-Hispanic2024	89.5%	46 / 102	837 / 3,144

Economy

Indicator	Value	In Illinois	In the US
Below Poverty Line2024	20.2%	4 / 102	451 / 3,144
Households on SNAP2024	17.3%	20 / 102	629 / 3,144
Income Inequality2024index	0.459	17 / 102	1,128 / 3,144
Median Household Income2024	$55,728	93 / 102	2,423 / 3,143
Per Capita Income2024	$31,657	91 / 102	2,152 / 3,144
Unemployment Rate2024	3.9%	67 / 102	1,865 / 3,144

Education

Indicator	Value	In Illinois	In the US
Bachelor's Degree or Higher2024	20.9%	50 / 102	1,765 / 3,144
High School or Higher2024	87.5%	88 / 102	2,122 / 3,144

Health Coverage

Indicator	Value	In Illinois	In the US
No Health Insurance2024	6.4%	19 / 102	1,999 / 3,144
With a Disability2024	21.1%	13 / 102	459 / 3,144

Population & Density

Indicator	Value	In Illinois	In the US
Population2025	16,656	63 / 102	1,997 / 3,144
Population Density2025/km²	16	55 / 102	1,615 / 3,144

Work & Commute

Indicator	Value	In Illinois	In the US
Commute by Public Transit2024	2.0%	5 / 102	179 / 3,144
Households with No Vehicle2024	9.6%	8 / 102	295 / 3,144
Mean Commute Time2024minutes	24.4	47 / 102	1,492 / 3,143
Work from Home2024	6.2%	72 / 102	2,302 / 3,144

Other counties of Illinois

Compare Union County against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.