Union Flag

Union

County:
McHenry County
County Seat:
No
Area (mi²):
36.604
State:
Illinois

Union is located in McHenry County, Illinois. Union has a 2025 population of 845 . Union is currently declining at a rate of -0.59% annually and its population has decreased by -4.09% since the most recent census, which recorded a population of 881 in 2020.

The average household income in Union is $63,690 with a poverty rate of 18.78%. The median age in Union is 42.7 years: 43.3 years for males, and 42 years for females. For every 100 females there are 119.0 males.

845
Total Population
23
Density (mi²)
-5 -0.59%
Growth

Union Population

Union Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Union includes 98.11% White, and smaller percentages for Black or African American, Two or more races and multiracial populations.

Population by Race

White (98.11%)

Black or African American (1%)

Two or more races (0.89%)

Race
Population
Percentage (of total)
White88398.11%
Black or African American91%
Two or more races80.89%

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 $32,632. Household income levels show a median of $49,375. The poverty rate stands at 18.78%.

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$76,667-
Families$64,306$69,074
Households$49,375$63,690
Non Families$43,125$51,228

$32,632

Average Income

$49,375

Median Household Income

18.78%

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)