| Place Name | Decatur Township |
| Place Type | Township |
| County | Marion County |
| Area Code(s) | 317,463 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 36,432 |
| Majority Ethnicity | White 74.63% |
| Metro/Micro Stats Area | Indianapolis-Carmel-Anderson, IN |
| US Congressional District(s) | Indiana 7th |
| State House Districts | 91 |
| State Senate Districts | 35 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 74.63% |
| African American | 14.23% |
| Hispanic | 0.33% |
| Asian | 1.05% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 9.75% |