| Official Name: | Petersville, Illinois |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Illinois#USA |
| Pushpin Label: | Petersville |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Mercer |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 669 |
| Coordinates: | 41.2794°N -90.9386°W |
| Area Code: | 309 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 423065 |
Petersville is an unincorporated community in Eliza Township, Mercer County, Illinois, United States.[1] Petersville is 6.5miles north-northwest of Joy.