Mason is located in Effingham County. About 323 people live here (as of 2020). Between 2010 and 2020, the population declined from 345 to 323. The region is at 180 meters above sea level. There are about 39 streets in Mason. The region was founded in 1865. The postal codes are 62443. The dialing code is 618. Mason is town in Effingham County, Illinois, United States.
| Year built | 1865 |
| Area | 1.3 |
| Elevation | 180 m |
| Located in | Effingham County |
| Postal code | 62443 |
| Country | United States |
| Population | 323 |
| Official name | Mason |
| Bike path |
| Bike lane on roadway |
| Cycling allowed on bus lane |
| Bicycle street |
| Open to cyclists |
| Open to cyclists, good path |
| Cycling prohibited |
| Cobblestone |
| Long-distance bike route | (depending on scale) |
| Long-distance bike route |
| Long-distance hiking trail | (depending on scale) |
| Long-distance hiking trail |
| Pedestrians prohibited |
Public transit map Mason Legend 
Bicycle map Mason Legend 
Pedestrian map Mason Legend