| Place Name | Pleasant Plain |
| Place Type | City |
| ZIP Code(s) | 52540 |
| County | Jefferson County |
| Area Code(s) | 319 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 59 |
| Population Growth Rate (2010-19) | -9.68% |
| Majority Ethnicity | White 100% |
| Metro/Micro Stats Area | Fairfield, IA |
| US Congressional District(s) | Iowa 2nd |
| State House Districts | 82 |
| State Senate Districts | 41 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |