| Place Name | Plainville |
| Place Type | Village |
| ZIP Code(s) | 62365 |
| County | Adams County |
| Area Code(s) | 217 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 350 |
| Population Growth Rate (2010-19) | 2.65% |
| Majority Ethnicity | White 99.33% |
| Metro/Micro Stats Area | Quincy, IL-MO |
| US Congressional District(s) | Illinois 18th |
| State House Districts | 94 |
| State Senate Districts | 47 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.33% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.67% |