Stephenson County is a county located in the U.S. state of Illinois. According to the 2010 United States Census, it had a population of 47,711. Its county seat is Freeport. 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. 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. File:Waddams hill.jpg|Marker marking Waddams' first settlement in Stephenson County File:Stephenson County Illinois 1837.png|Stephenson County at the time of its creation in 1837. Its boundaries have remained unchanged since then.


According to the US Census Bureau, the county has a total area of , of which is land and (0.09%) is water.

Climate and weather

In recent years the average temperatures in the county seat of Freeport, have ranged from a low of in January to a high of in July, although a record low of was recorded in January 2009 and a record high of was recorded in July 1988. Average monthly precipitation ranged from in January to in June.

Adjacent counties

* Green County, Wisconsin (north) * Winnebago County (east) * Ogle County (southeast) * Carroll County (southwest) * Jo Daviess County (west) * Lafayette County, Wisconsin (northwest)

Major highways

* US Highway 20 * Illinois Route 26 * Illinois Route 73 * Illinois Route 75


As of the 2010 United States Census, there were 47,711 people, 19,845 households, and 13,015 families residing in the county. The population density was . There were 22,081 housing units at an average density of . 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. In terms of ancestry, 46.6% were German, 12.5% were Irish, 10.0% were English, and 8.0% were American. 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. 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.


There are five public high schools and one private high Schools in the county: (approximate enrollment included) Public high schools * Freeport High 1,254 * Lena-Winslow High 299 * Dakota High 254 * Pearl City High 150 * Orangeville High 142 Private high school * Aquin Catholic High 93


A northerly look across Stephenson County's western edge from an overlook near Kent


* Freeport


* Dakota


* Cedarville * Davis * German Valley * Lena * Orangeville * Pearl City * Ridott * Rock City * Winslow

Census-designated place

* Lake Summerset

Unincorporated communities

* Afolkey * Bolton * Buckhorn Corners * Buena Vista * Damascus * Eleroy * Evarts * Florence * Kent * Loran * McConnell * Oneco * Red Oak * Rock Grove * Scioto Mills * Waddams Grove * Winneshiek


* Buckeye * Dakota * Erin * Florence * Freeport * Harlem * Jefferson * Kent * Lancaster * Loran * Oneco * Ridott * Rock Grove * Rock Run * Silver Creek * Waddams * West Point * Winslow


See also

* List of counties in Illinois * List of Illinois county name etymologies * National Register of Historic Places listings in Stephenson County, Illinois


External links

Stephenson County

Benjamin Stephenson House Restoration Project

Stephenson County Historical Society & Museum

Freeport/Stephenson County Convention and Visitors Bureau

Illinois Ancestors Stephenson Tombstone Project

''Genealogy Trails'' for Stephenson County

Illinois High School Association – School Enrollments
{{Coord|42.35|-89.67|display=title|type:adm2nd_region:US-IL_source:UScensus1990 Category:1837 establishments in Illinois Category:Illinois counties Category:Populated places established in 1837 *