| Place Name | Castine |
| Place Type | Village |
| ZIP Code(s) | 45304 45346 45382 |
| County | Darke County |
| Area Code(s) | 326,937 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 137 |
| Population Growth Rate (2010-19) | -15.38% |
| Majority Ethnicity | White 97.81% |
| Metro/Micro Stats Area | Greenville, OH |
| US Congressional District(s) | Ohio 8th |
| State House Districts | 80 |
| State Senate Districts | 5 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.81% |
| African American | 0% |
| Hispanic | 1.09% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.09% |