| Unit Pref: | Imperial |
| Settlement Type: | Precinct |
| Official Name: | Petersburg South No. 15 Precinct |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Menard |
| Area Total Km2: | 32.07 |
| Area Land Km2: | 31.16 |
| Area Water Km2: | 0.91 |
| Area Water Percent: | 2.8 |
| Population As Of: | 2000 |
| Population Total: | 997 |
| Population Density Km2: | 31.1 |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
Petersburg South No. 15 Precinct is located in Menard County, Illinois, United States. The population was 997 at the 2000 census.