Union Flag

Union

County:
McHenry County
County Seat:
No
Area (mi²):
35.792
State:
Illinois

Union is located in McHenry County, Illinois. Union has a 2025 population of 766 . Union is currently growing at a rate of 0.13% annually but its population has decreased by -1.03% since the most recent census, which recorded a population of 774 in 2020.

The median household income in Union is $71,838 with a poverty rate of 4.92%. The median age in Union is 38.3 years: 38.2 years for males, and 40.2 years for females. For every 100 females there are 109.2 males.

766
Total Population
21
Density (mi²)
1 0.13%
Growth

Union Population

Union Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Union includes 99.12% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

White (99.12%)

Two or more races (0.88%)

Race
Population
Percentage (of total)
White56499.12%
Two or more races50.88%

Union Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Union's average per capita income is $48,969. Household income levels show a median of $71,838. The poverty rate stands at 4.92%.

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$96,250-
Families$86,793$100,181
Households$71,838$81,257
Non Families-$39,814

$48,969

Average Income

$71,838

Median Household Income

4.92%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)