Sullivan, Illinois

Sullivan, Illinois
South side of courthouse square in Sullivan
Motto: 
"More Than Just a Small Town”
Interactive map of Sullivan, Illinois
Sullivan
Sullivan
Coordinates: 39°36′01″N 88°37′12″W / 39.60028°N 88.62000°W / 39.60028; -88.62000
CountryUnited States
StateIllinois
CountyMoultrie
TownshipSullivan
FoundedMarch 7, 1845
Named afterSullivan's Island, Charleston Harbor, South Carolina
Area
 • Total
2.78 sq mi (7.19 km2)
 • Land2.77 sq mi (7.17 km2)
 • Water0.0077 sq mi (0.02 km2)
Elevation
676 ft (206 m)
Population
 (2020)
 • Total
4,413
 • Density1,594.0/sq mi (615.44/km2)
Time zoneUTC-6 (CST)
 • Summer (DST)UTC-5 (CDT)
ZIP code
61951
Area code217
FIPS code17-73495
GNIS ID2395997
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.