Hennepin Flag

Hennepin

County:
Putnam County
County Seat:
Yes
Area (mi²):
5.307
State:
Illinois

Hennepin is a village located in Putnam County, Illinois. Hennepin has a 2025 population of 729. It is also the county seat of Putnam County. Hennepin is currently declining at a rate of -0.82% annually and its population has decreased by -3.95% since the most recent census, which recorded a population of 759 in 2020.

The average household income in Hennepin is $94,538 with a poverty rate of 7.27%.The median age in Hennepin is 39.9 years: 39.7 years for males, and 40 years for females.

729
Total Population
137
Density (mi²)
-6 -0.82%
Growth

Hennepin Population

Hennepin Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Hennepin includes 96.58% White, and smaller percentages for Two or more races, Black or African American, other race and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White76396.58%
Two or more races182.28%
Black or African American50.63%
Other race40.51%

Hennepin Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Hennepin's average per capita income is $50,217. Household income levels show a median of $78,594. The poverty rate stands at 7.27%.

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$119,911-
Families$117,500$114,939
Households$78,594$94,538
Non Families$37,813$56,331

$50,217

Average Income

$78,594

Median Household Income

7.27%

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)