| Place Name | Plain Township |
| Place Type | Township |
| ZIP Code(s) | 46538 46542 46580 46582 |
| County | Kosciusko County |
| Area Code(s) | 574 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 8,749 |
| Majority Ethnicity | White 78.47% |
| Metro/Micro Stats Area | Warsaw, IN |
| US Congressional District(s) | Indiana 3rdIndiana 2nd |
| State House Districts | 18,22 |
| State Senate Districts | 9 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 78.47% |
| African American | 0.64% |
| Hispanic | 0.07% |
| Asian | 3.1% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 17.72% |