Whiteside County, Illinois

Whiteside County
County
Whiteside County Courthouse, Morrison
Logo
Location within the U.S. state of Illinois
Illinois's location within the U.S.
Coordinates: 41°45′N 89°55′W / 41.75°N 89.91°W / 41.75; -89.91
Country	United States
State	Illinois
Founded	1836
Named for	Samuel Whiteside
Seat	Morrison
Largest city	Sterling
Area
• Total	697 sq mi (1,810 km2)
• Land	684 sq mi (1,770 km2)
• Water	12 sq mi (30 km2)  1.8%
Population  (2020)
• Total	55,691
• Estimate  (2023)	54,498
• Density	80/sq mi (31/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	17th
Website	www.whitesidecountyil.gov

Whiteside County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 55,691.^[1] Its county seat is Morrison.^[2] The county is bounded on the west by the Mississippi River. Whiteside County comprises the Sterling, IL Micropolitan Statistical Area, which is also included in the Dixon-Sterling, IL Combined Statistical Area. U.S. President Ronald Reagan was born in 1911 in the Whiteside County community of Tampico.