| Place Name | Monroe Township (Preble County) |
| Place Type | Township |
| ZIP Code(s) | 45320 45321 45338 45347 45382 |
| County | Preble County |
| Area Code(s) | 326,937 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 2,233 |
| Majority Ethnicity | White 96.58% |
| US Congressional District(s) | Ohio 8th |
| State House Districts | 43 |
| State Senate Districts | 5 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.58% |
| African American | 1.36% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.06% |