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 and multiracial populations.

Population by Race

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%

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