| Place Name | Castleton Township |
| Place Type | Township |
| ZIP Code(s) | 48897 49058 49073 |
| County | Barry County |
| Area Code(s) | 517,269 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 3,346 |
| Majority Ethnicity | White 95.22% |
| US Congressional District(s) | Michigan 3rd |
| State House Districts | 87 |
| State Senate Districts | 19 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.22% |
| African American | 0% |
| Hispanic | 0.32% |
| Asian | 0.12% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.34% |