| Place Name | Mill Creek |
| Place Type | Town |
| ZIP Code(s) | 74856 |
| County | Johnston County |
| Area Code(s) | 580 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 464 |
| Population Growth Rate (2010-19) | -8.15% |
| Majority Ethnicity | White 83.12% |
| US Congressional District(s) | Oklahoma 2nd |
| State House Districts | 22 |
| State Senate Districts | 14 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 83.12% |
| African American | 0% |
| Hispanic | 12.99% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.9% |