Hennepin Flag

Hennepin

County:
Putnam County
County Seat:
Yes
Area (mi²):
41.389
State:
Illinois

Hennepin is located in Putnam County, Illinois. Hennepin has a 2025 population of 1,249 . It is also the county seat of Putnam County . Hennepin is currently growing at a rate of 0.81% annually and its population has increased by 1.05% since the most recent census, which recorded a population of 1,236 in 2020.

The average household income in Hennepin is $103,514 with a poverty rate of 11.62%. The median age in Hennepin is 40.1 years: 40.8 years for males, and 39.8 years for females. For every 100 females there are 110.2 males.

1.2K
Total Population
30
Density (mi²)
10 0.81%
Growth

Hennepin Population

Hennepin Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Hennepin includes 96.29% White, and smaller percentages for Two or more races, Asian, other race, Black or African American and multiracial populations.

Population by Race

White (96.29%)

Two or more races (1.44%)

Asian (1.03%)

Other race (0.89%)

Black or African American (0.34%)

Race
Population
Percentage (of total)
White1,40396.29%
Two or more races211.44%
Asian151.03%
Other race130.89%
Black or African American50.34%

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 $51,467. Household income levels show a median of $83,942. The poverty rate stands at 11.62%.

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$128,750-
Families$118,571$115,110
Households$83,942$103,514
Non Families$34,205$51,277

$51,467

Average Income

$83,942

Median Household Income

11.62%

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)