Shiawassee County, Michigan

county in Michigan, United States

Shiawassee /ˌʃ.əˈwɒs/ is a county located in the U.S. state of Michigan. As of the 2020 census, the population was 68,094.[2] The county seat is Corunna,[3] and the largest city in the county is Owosso.

Shiawassee County
Shiawassee County Courthouse in Corunna
Shiawassee County Courthouse in Corunna
Map of Michigan highlighting Shiawassee County
Location within the U.S. state of Michigan
Map of the United States highlighting Michigan
Michigan's location within the U.S.
Coordinates: 42°57′N 84°08′W / 42.95°N 84.14°W / 42.95; -84.14
Country United States
State Michigan
FoundedSeptember 10, 1822 (created)
1837 (organized)[1]
Named forShiawassee River
Largest cityOwosso
 • Total541 sq mi (1,400 km2)
 • Land531 sq mi (1,380 km2)
 • Water10 sq mi (30 km2)  1.9%
 • Total68,094
 • Density130/sq mi (51/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)


  1. "Bibliography on Shiawassee County". Clarke Historical Library, Central Michigan University. Retrieved January 29, 2013.
  2. 2.0 2.1 "Shiawassee County, Michigan". United States Census Bureau. Retrieved August 7, 2023.
  3. "Find a County". National Association of Counties. Retrieved June 7, 2011.