St. Peter is located in Fayette County. About 322 people live here (as of 2020). Between 2010 and 2020, the population declined from 359 to 322. The region is at 56 meters above sea level. There are about 41 streets in St. Peter. The postal codes are 62880. The dialing code is 618. St. Peter is village in Fayette County, Illinois, United States.
| Area | 0.5 |
| Elevation | 55.6 m |
| Located in | Fayette County |
| Postal code | 62880 |
| Country | United States |
| Population | 322 |
| Official name | St. Peter |
| 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 St. Peter Legend 
Bicycle map St. Peter Legend 
Pedestrian map St. Peter Legend