EntityQ120783· pop 45· linked from 354 articlesSalemSign in to savecity in Illinois, United StatesKey factsCountryUnited StatesStateIllinoisCountyMarionTownshipsSalem , TontiMayorNicolas FarleyTotal7.15 sq mi (18.51 km )Land6.99 sq mi (18.11 km )Water0.15 sq mi (0.40 km )Elevation545 ft (166 m)Density1,041.6/sq mi (402.18/km )Time zoneUTC-6 ( CST )Summer dstUTC-5 ( CDT )Fips code17-67236Websitewww .salemil .usvia Wikipedia infoboxArticleSalem is a city in and the county seat of Marion County, Illinois, United States. The population was 7,282 at the 2020 census.HistoryRead full article (52 paragraphs)ConnectionsAfrican AmericansEntityUnited States Census BureauEntityCategoriesCities in IllinoisCities in Marion County, IllinoisCounty seats in IllinoisSundown towns in Illinois