Stephenson County is located in the northwest corner of Illinois and is part of the Rockford Metropolitan Statistical Area. The county seat is Freeport. The county was formed in 1837.

The county is governed by a board of commissioners, which consists of seven members elected from seven districts. The county is divided into twenty-two townships, which provide local government services.

The county is home to several state parks, including Apple River Canyon State Park, White Pines State Park, and Lowden State Park.

The county is served by two public school districts, Freeport School District 145 and Pearl City Community Unit School District 200.

The county is served by two hospitals, FHN Memorial Hospital and Monroe Clinic.

The county is served by two airports, Stephenson County Airport and Freeport Regional Airport.

The county is served by two major highways, US 20 and US 52.

The county is served by two major railroads, Union Pacific and Canadian National.

For the most up-to-date and in-depth information, please check the public records links below.