Williamson is located in Madison County. About 183 people live here (as of 2020). Between 2010 and 2020, the population declined from 230 to 183. There are about 18 streets in Williamson. Williamson is human settlement in Illinois, United States of America.
| Area | 1.6 |
| Located in | Madison County |
| Country | United States |
| Population | 183 |
| Official name | Williamson |
| 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 Williamson Legend 
Bicycle map Williamson Legend 
Pedestrian map Williamson Legend