Union

County:: McHenry County
County Seat:: No
Area (mi²):: 0.836
State:: Illinois

Union is a village located in McHenry County, Illinois. Union has a 2025 population of 623. Union is currently growing at a rate of 2.47% annually and its population has increased by 13.27% since the most recent census, which recorded a population of 550 in 2020.

The average household income in Union is $106,340 with a poverty rate of 4.25%. The median age in Union is 38.1 years: 36.4 years for males, and 39.4 years for females.

Demographics

The racial composition of Union includes 91.77% White, 5.58% Asian, and smaller percentages for other race, Two or more races, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Asian

Other race

Two or more races

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	691	91.77%
Asian	42	5.58%
Other race	11	1.46%
Two or more races	7	0.93%
Black or African American	2	0.27%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Union Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Union's average per capita income is $49,286. Household income levels show a median of $100,104. The poverty rate stands at 4.25%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$123,438	-
Families	$102,188	$124,051
Households	$100,104	$106,340
Non Families	-	$67,714

$49,286

Average Income

$100,104

Median Household Income

4.25%

Poverty Rate