Johnson County is located in Illinois. About 13,308 people live here (as of 2020). Between 2010 and 2020, the population grew from 12,582 to 13,308. The area covers about 904.0 square kilometers. The region is divided into 7 Municipalities. The region was founded in 1812. The name originates from Richard Mentor Johnson (vice president of the United States from 1837 to 1841) Johnson County is county in Illinois, United States.
| Named after | Richard Mentor Johnson |
| Year built | 1812 |
| Area | 904 km² |
| Located in | Illinois |
| Country | United States |
| Population | 13308 |
| Native name | Johnson County |
| 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 Johnson County Legend 
Bicycle map Johnson County Legend 
Pedestrian map Johnson County Legend