| Place Name | Williamsfield |
| Place Type | Village |
| ZIP Code(s) | 61489 |
| County | Knox County |
| Area Code(s) | 309 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 608 |
| Population Growth Rate (2010-19) | -0.52% |
| Majority Ethnicity | White 87.04% |
| Metro/Micro Stats Area | Galesburg, IL |
| US Congressional District(s) | Illinois 17th |
| State House Districts | 74 |
| State Senate Districts | 37 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 87.04% |
| African American | 12.55% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.41% |