| Place Name | Hillsdale |
| Place Type | Village |
| ZIP Code(s) | 61257 |
| County | Rock Island County |
| Area Code(s) | 309 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 549 |
| Population Growth Rate (2010-19) | -20.27% |
| Majority Ethnicity | White 93.55% |
| Metro/Micro Stats Area | Davenport-Moline-Rock Island, IA-IL |
| US Congressional District(s) | Illinois 17th |
| State House Districts | 71 |
| State Senate Districts | 36 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 93.55% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 6.45% |