| Place Name | Rock Run Township |
| Place Type | Township |
| County | Stephenson County |
| Area Code(s) | 815,779 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 2,098 |
| Majority Ethnicity | White 99.14% |
| Metro/Micro Stats Area | Freeport, IL |
| US Congressional District(s) | Illinois 17th |
| State House Districts | 89 |
| State Senate Districts | 45 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.14% |
| African American | 0% |
| Hispanic | 0.34% |
| Asian | 0.14% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.38% |