Mason is an incorporated town in Effingham County, Illinois, United States. The population was 323 at the 2020 census. It was named after Roswell Mason, an official of the Illinois Central Railroad. Mason is part of the Effingham, IL Micropolitan Statistical Area.
Geography
Mason is located in southern Effingham County. Illinois Route 37 passes through the town, leading northeast to Watson and southwest to Edgewood. Interstate 57 crosses the northwest corner of Mason, but the closest access is from Edgewood to the southwest or from Exit 151 to the northeast. Via I-57 it is north to Effingham, the county seat, and southwest to Mount Vernon.
According to the 2021 census gazetteer files, Mason has a total area of , of which (or 99.61%) is land and (or 0.39%) is water.
Demographics
As of the 2020 census