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.

Demographics

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

Population by Race

White

Two or more races

Black or African American

Other race

Native American

Asian

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	763	96.58%
Two or more races	18	2.28%
Black or African American	5	0.63%
Other race	4	0.51%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%

Hennepin Marital Status

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