| Place Name | Martinsville |
| Place Type | Village |
| ZIP Code(s) | 45146 |
| County | Clinton County |
| Area Code(s) | 326,937 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 454 |
| Population Growth Rate (2010-19) | -10.15% |
| Majority Ethnicity | White 98.15% |
| Metro/Micro Stats Area | Wilmington, OH |
| US Congressional District(s) | Ohio 15th |
| State House Districts | 91 |
| State Senate Districts | 17 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.15% |
| African American | 0.77% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.08% |