Stephenson County is a county located in the U.S. state of Illinois. According to the 2020 United States Census, it had a population of 44,630.[1] Its county seat is Freeport.[2] Stephenson County is included in the Freeport, IL Micropolitan Statistical Area, which is also included in the Rockford-Freeport-Rochelle, IL Combined Statistical Area.
The land that became Stephenson County was first settled by William Waddams in 1832, who founded Waddams Grove.[3] By 1837, population was sufficient to form Stephenson County, taking land from Jo Daviess and Winnebago counties. The county was named for Colonel Benjamin Stephenson, an official of the Illinois Territory.[4]
According to the US Census Bureau, the county has a total area of 565 square miles (1,460 km2), of which 565 square miles (1,460 km2) is land and 0.5 square miles (1.3 km2) (0.09%) is water.[5]
In recent years the average temperatures in the county seat of Freeport, have ranged from a low of 9 °F (−13 °C) in January to a high of 82 °F (28 °C) in July, although a record low of −29 °F (−34 °C) was recorded in January 2009 and a record high of 101 °F (38 °C) was recorded in July 1988. Average monthly precipitation ranged from 1.33 inches (34 mm) in January to 4.46 inches (113 mm) in June.[6]
As of the 2010 United States Census, there were 47,711 people, 19,845 households, and 13,015 families residing in the county.[12] The population density was 84.5 inhabitants per square mile (32.6/km2). There were 22,081 housing units at an average density of 39.1 per square mile (15.1/km2).[5] The racial makeup of the county was 86.5% white, 9.0% black or African American, 0.6% Asian, 0.2% American Indian, 1.2% from other races, and 2.5% from two or more races. Those of Hispanic or Latino origin made up 2.9% of the population.[12] In terms of ancestry, 46.6% were German, 12.5% were Irish, 10.0% were English, and 8.0% were American.[13]
Of the 19,845 households, 28.6% had children under the age of 18 living with them, 50.3% were married couples living together, 11.2% had a female householder with no husband present, 34.4% were non-families, and 29.7% of all households were made up of individuals. The average household size was 2.36 and the average family size was 2.90. The median age was 43.1 years.[12]
The median income for a household in the county was $43,304 and the median income for a family was $54,224. Males had a median income of $41,672 versus $29,510 for females. The per capita income for the county was $22,608. About 12.3% of families and 14.8% of the population were below the poverty line, including 24.1% of those under age 18 and 7.3% of those age 65 or over.[14]
There are five public high schools and one private high Schools in the county: (approximate enrollment included)
Public high schools
Private high school
42°21′N 89°40′W / 42.35°N 89.67°W / 42.35; -89.67
