| Place Name | Middletown |
| Place Type | City |
| ZIP Code(s) | 52638 |
| County | Des Moines County |
| Area Code(s) | 319 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 257 |
| Population Growth Rate (2010-19) | 14.15% |
| Majority Ethnicity | White 92.14% |
| Metro/Micro Stats Area | Burlington, IA-IL |
| US Congressional District(s) | Iowa 2nd |
| State House Districts | 88 |
| State Senate Districts | 44 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.14% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0.49% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 7.37% |