| Place Name | Mercer Township |
| Place Type | Township |
| ZIP Code(s) | 61231 |
| County | Mercer County |
| Area Code(s) | 309 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 4,000 |
| Majority Ethnicity | White 95.43% |
| Metro/Micro Stats Area | Davenport-Moline-Rock Island, IA-IL |
| US Congressional District(s) | Illinois 17th |
| State House Districts | 74 |
| State Senate Districts | 37 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.43% |
| African American | 1.72% |
| Hispanic | 0% |
| Asian | 0.8% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.05% |