| Place Name | Harper |
| Place Type | City |
| ZIP Code(s) | 52231 |
| County | Keokuk County |
| Area Code(s) | 641 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 92 |
| Population Growth Rate (2010-19) | 3.51% |
| Majority Ethnicity | White 97.5% |
| US Congressional District(s) | Iowa 2nd |
| State House Districts | 78 |
| State Senate Districts | 39 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.5% |
| African American | 0.83% |
| Hispanic | 0.83% |
| Asian | 0.83% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |