The area's first non-native settlers were mostly from the six New England states.[3] The early nineteenth century saw a wave of westward movement from New England, due largely to completion of the Erie Canal and the end of the Black Hawk War.[4][5]
Lee County's boundaries have remained unchanged since its creation in 1839.
Geography
According to the US Census Bureau, the county has a total area of 729 square miles (1,890 km2), of which 725 square miles (1,880 km2) is land and 4.1 square miles (11 km2) (0.6%) is water.[8]
In recent years, average temperatures in the county seat of Dixon have ranged from a low of 10 °F (−12 °C) in January to a high of 82 °F (28 °C) in July, although a record low of −27 °F (−33 °C) was recorded in January 1999 and a record high of 110 °F (43 °C) was recorded in July 1936. Average monthly precipitation ranges from 1.43 inches (36 mm) in February to 4.88 inches (124 mm) in June.[9]
As of the 2010 United States Census, there were 36,031 people, 13,758 households, and 9,064 families residing in the county.[16] The population density was 49.7 inhabitants per square mile (19.2/km2). There were 15,049 housing units at an average density of 20.8 per square mile (8.0/km2).[8] The racial makeup of the county was 90.9% white, 4.8% black or African American, 0.7% Asian, 0.2% American Indian, 1.9% from other races, and 1.5% from two or more races. Those of Hispanic or Latino origin made up 5.0% of the population.[16] In terms of ancestry, 38.0% were German, 18.8% were Irish, 8.4% were English, and 8.2% were American.[17]
Of the 13,758 households, 30.0% had children under the age of 18 living with them, 51.2% were married couples living together, 10.0% had a female householder with no husband present, 34.1% were non-families, and 28.8% of all households were made up of individuals. The average household size was 2.41 and the average family size was 2.94. The median age was 42.0 years.[16]
The median income for a household in the county was $48,502 and the median income for a family was $60,759. Males had a median income of $42,114 versus $30,920 for females. The per capita income for the county was $24,440. About 7.6% of families and 9.6% of the population were below the poverty line, including 11.8% of those under age 18 and 6.5% of those age 65 or over.[18]
Lee County is, together with neighboring Ogle County, the most consistently Republican county in Illinois. It is one of very few counties in the United States to have never supported a Democrat for President since the Civil War. The only occasion when the Republican candidate did not win the county in this time was in 1912, when Theodore Roosevelt carried it while running as a member of the Progressive Party, unofficially known as the "Bull Moose" party.
As of 2018, Lee County is in the 16th congressional district, the 45th legislative district, and the 74th and 90th representative districts.[19]
United States presidential election results for Lee County, Illinois[20]
^"Find a County". National Association of Counties. Retrieved June 7, 2011.
^Stevens, Frank Everett. History of Lee County, Illinois, Vol. 1 p. 382
^Holbrook, Stewart Hall. The Yankee Exodus: An Account of Migration from New England, University of Washington Press (1968)
^Shalev, Eran. American Zion: The Old Testament as a Political Text from the Revolution to ..., Yale University Press (March 26, 2013) ISBN9780300186925 pp. 70-71
