Duncan Township Illinois Profile
| Place Name | Duncan Township |
| Place Type | Township |
| ZIP Code(s) | 61231 61260 61279 |
| County | Mercer County |
| Area Code(s) | 309 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 334 |
| Majority Ethnicity | White 100% |
| Metro/Micro Stats Area | Davenport-Moline-Rock Island, IA-IL |
| US Congressional District(s) | Illinois 17th |
| State House Districts | 74 |
| State Senate Districts | 37 |
Duncan Township Race/Ethnicity Data
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |