Putnam County, Illinois
Putnam County is the least extensive county in the U.S. state of Illinois. According to the 2020 United States census, it had a population of 5,637. The county seat is Hennepin. The county was formed in 1825 out of Fulton County and named after Israel Putnam, who was a general in the American Revolution. Putnam County is part of the Ottawa, IL Micropolitan Statistical Area.
Geography
According to the U.S. Census Bureau, the county has a total area of, of which is land and is water. It is the smallest county in Illinois by area.Climate and weather
In recent years, average temperatures in the county seat of Hennepin have ranged from a low of in January to a high of in July, although a record low of was recorded in January 1999 and a record high of was recorded in June 1988. Average monthly precipitation ranged from in January to in August.Major highways
- Interstate 180
- Illinois Route 18
- Illinois Route 26
- Illinois Route 29
- Illinois Route 71
- Illinois Route 89
Adjacent counties
Demographics
2020 census
As of the 2020 census, the county had a population of 5,637. The median age was 47.0 years. 19.2% of residents were under the age of 18 and 22.5% of residents were 65 years of age or older. For every 100 females there were 102.0 males, and for every 100 females age 18 and over there were 100.4 males age 18 and over.The racial makeup of the county was 91.8% White, 0.5% Black or African American, 0.2% American Indian and Alaska Native, 0.3% Asian, 0.1% Native Hawaiian and Pacific Islander, 2.3% from some other race, and 4.8% from two or more races. Hispanic or Latino residents of any race comprised 6.2% of the population.
Less than 0.1% of residents lived in urban areas, while 100.0% lived in rural areas.
There were 2,426 households in the county, of which 25.9% had children under the age of 18 living in them. Of all households, 53.8% were married-couple households, 17.8% were households with a male householder and no spouse or partner present, and 20.8% were households with a female householder and no spouse or partner present. About 27.1% of all households were made up of individuals and 12.9% had someone living alone who was 65 years of age or older.
There were 3,057 housing units, of which 20.6% were vacant. Among occupied housing units, 82.2% were owner-occupied and 17.8% were renter-occupied. The homeowner vacancy rate was 2.4% and the rental vacancy rate was 9.9%.
2010 census
As of the 2010 census, there were 6,006 people, 2,509 households, and 1,734 families residing in the county. The population density was. There were 3,074 housing units at an average density of. The racial makeup of the county was 96.6% white, 0.5% black or African American, 0.2% Asian, 0.1% American Indian, 1.4% from other races, and 1.1% from two or more races. Those of Hispanic or Latino origin made up 4.2% of the population. In terms of ancestry, 46.5% were German, 16.7% were Irish, 16.3% were Italian, 10.9% were Polish, 10.1% were English, 5.1% were Swedish, and 3.5% were American.Of the 2,509 households, 27.7% had children under the age of 18 living with them, 57.6% were married couples living together, 7.2% had a female householder with no husband present, 30.9% were non-families, and 26.0% of all households were made up of individuals. The average household size was 2.39 and the average family size was 2.85. The median age was 45.2 years.
The median income for a household in the county was $56,458 and the median income for a family was $68,875. Males had a median income of $50,205 versus $31,886 for females. The per capita income for the county was $27,004. About 6.2% of families and 10.9% of the population were below the poverty line, including 21.8% of those under age 18 and 5.4% of those age 65 or over.