| Place Name | Old Mill Creek |
| Place Type | Village |
| ZIP Code(s) | 60002 60031 60046 60083 |
| County | Lake County |
| Area Code(s) | 224,847 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 144 |
| Population Growth Rate (2010-19) | -8.99% |
| Majority Ethnicity | White 86.47% |
| Metro/Micro Stats Area | Chicago-Naperville-Elgin, IL-IN-WI |
| US Congressional District(s) | Illinois 14th |
| State House Districts | 61 |
| State Senate Districts | 31 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 86.47% |
| African American | 0% |
| Hispanic | 0.48% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 13.04% |