Stephenson County
Also known as Stephenson County, Illinois, Stephenson County, IL
county in Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- Named after
- Benjamin Stephenson
- Seat
- Freeport
- Largest city
- Freeport
- Total
- 565 sq mi (1,460 km )
- Land
- 565 sq mi (1,460 km )
- Water
- 0.5 sq mi (1.3 km ) 0.09%
- Estimate 2025
- 43,220
- Density
- 79.0/sq mi (30.5/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional districts
~7 min read
Article
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. 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.
History