| Place Name | Decker |
| Place Type | Town |
| ZIP Code(s) | 47524 |
| County | Knox County |
| Area Code(s) | 812,930 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 236 |
| Population Growth Rate (2010-19) | -20.08% |
| Majority Ethnicity | White 100% |
| Metro/Micro Stats Area | Vincennes, IN |
| US Congressional District(s) | Indiana 8th |
| State House Districts | 64 |
| State Senate Districts | 48 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |