| Place Name | Penn Township (Johnson County) |
| Place Type | Township |
| ZIP Code(s) | 52240 52241 52245 52317 52333 |
| County | Johnson County |
| Area Code(s) | 319 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 32,137 |
| Majority Ethnicity | White 82.52% |
| Metro/Micro Stats Area | Iowa City, IA |
| US Congressional District(s) | Iowa 2nd |
| State House Districts | 74,77 |
| State Senate Districts | 37,39 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 82.52% |
| African American | 5.78% |
| Hispanic | 0.17% |
| Asian | 6.86% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.67% |