Sullivan, Illinois

Sullivan, Illinois
South side of courthouse square in Sullivan
Motto: 
"More Than Just a Small Town”
Location in Moultrie County, Illinois
Sullivan
Location in the United States
Coordinates: 39°35′42″N 88°36′30″W / 39.59500°N 88.60833°W / 39.59500; -88.60833
Country United States
State Illinois
CountyMoultrie
TownshipSullivan
FoundedMarch 7, 1845
Named afterSullivan's Island, Charleston Harbor, South Carolina
Government
  MayorMike Mossman
Area
  Total
2.78 sq mi (7.19 km2)
  Land2.77 sq mi (7.17 km2)
  Water0.01 sq mi (0.02 km2)
Elevation
676 ft (206 m)
Population
 (2020)
  Total
4,413
  Density1,593.72/sq mi (615.44/km2)
Time zoneUTC-6 (CST)
  Summer (DST)UTC-5 (CDT)
ZIP code
61951
Area code217
FIPS code17-73495
GNIS ID2395997
Wikimedia CommonsSullivan, Illinois
Websitesullivanil.us

Sullivan is the largest city and the county seat of Moultrie County, Illinois, United States. The population was 4,413 at the time of the 2020 census. Sullivan is named after Sullivan's Island, South Carolina, where Fort Moultrie is located.