Named for Israel Putnam Congressional district 16th Website www.co.putnam.il.us Founded 1825 County seat Hennepin | Largest village Granville Time zone Central: UTC-6/-5 Area 445.5 km² Population 5,801 (2013) Unemployment rate 5.3% (Apr 2015) | |
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Cities Hennepin, McNabb, Granville Township, Magnolia Rivers Illinois River, Senachwine Creek, Little Sandy Creek | ||
Putnam County is the least extensive county in the U.S. state of Illinois. According to the 2010 census, it had a population of 6,006. 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.
Contents
- Map of Putnam County IL USA
- Geography
- Climate and weather
- Major highways
- Adjacent counties
- Demographics
- Villages
- Unincorporated communities
- Townships
- References
Map of Putnam County, IL, USA
Putnam County is part of the Ottawa-Peru, IL Micropolitan Statistical Area, which is also included in the Chicago-Naperville, IL-IN-WI Combined Statistical Area.
Geography
According to the U.S. Census Bureau, the county has a total area of 172 square miles (450 km2), of which 160 square miles (410 km2) is land and 12 square miles (31 km2) (7.0%) 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 13 °F (−11 °C) in January to a high of 86 °F (30 °C) in July, although a record low of −30 °F (−34 °C) was recorded in January 1999 and a record high of 104 °F (40 °C) was recorded in June 1988. Average monthly precipitation ranged from 1.14 inches (29 mm) in January to 4.32 inches (110 mm) in August.
Major highways
Adjacent counties
Demographics
As of the 2010 United States Census, there were 6,006 people, 2,509 households, and 1,734 families residing in the county. The population density was 37.5 inhabitants per square mile (14.5/km2). There were 3,074 housing units at an average density of 19.2 per square mile (7.4/km2). 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.
Villages
Unincorporated communities
Townships
Putnam County is divided into four townships: