Sangamon County, Illinois

Sangamon County
Sangamon County Courthouse in 2017
Flag of Sangamon County
Official seal of Sangamon County
Map of Illinois highlighting Sangamon County
Location within the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location within the U.S.
Coordinates: 39°46′N 89°40′W / 39.76°N 89.66°W / 39.76; -89.66
Country United States
State Illinois
Founded1821
Named forSangamon River
SeatSpringfield
Largest citySpringfield
Area
 • Total877 sq mi (2,270 km2)
 • Land868 sq mi (2,250 km2)
 • Water8.7 sq mi (23 km2)  1.0%
Population
 (2020)
 • Total196,343
 • Density220/sq mi (86/km2)
Congressional districts13th, 15th
Websitewww.co.sangamon.il.us

Sangamon County is a county located near the center of the U.S. state of Illinois. According to the 2020 census, it had a population of 196,343.[1] Its county seat and largest city is Springfield,[2] the state capital.

Sangamon County is included in the Springfield, IL Metropolitan Statistical Area.

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