Sullivan is located in Moultrie County. About 4,413 people live here (as of 2020). Between 2010 and 2020, the population declined from 4,440 to 4,413. The region is at 205 meters above sea level. The area covers about 7.0 square kilometers. There are about 178 streets in Sullivan. The region was founded in 1845. The postal codes are 61951. The dialing code is 217. The name originates from Sullivan's Island (town on the island of the same name) Sullivan is city in Illinois. Among other things, Sullivan has restaurants, supermarkets and schools. More information at
www.sullivanil.us.