Whiteside County, Illinois

Whiteside County
Whiteside County Courthouse, Morrison
Official logo of Whiteside County
Map of Illinois highlighting Whiteside County
Location within the U.S. state of Illinois
Map of the United States highlighting 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
Founded1836
Named forSamuel Whiteside
SeatMorrison
Largest citySterling
Area
 • Total697 sq mi (1,810 km2)
 • Land684 sq mi (1,770 km2)
 • Water12 sq mi (30 km2)  1.8%
Population
 (2020)
 • Total55,691
 • Estimate 
(2023)
54,498 Decrease
 • Density80/sq mi (31/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district17th
Websitewww.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.

  1. ^ "Whiteside County, Illinois". United States Census Bureau. Retrieved June 10, 2023.
  2. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.