| Place Name | Oak Grove |
| Place Type | Census Designated Place |
| ZIP Code(s) | 39402 39475 |
| County | Lamar County |
| Area Code(s) | 601,769 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 1,891 |
| Majority Ethnicity | African American 48.77% |
| Metro/Micro Stats Area | Hattiesburg, MS |
| US Congressional District(s) | Mississippi 4th |
| State House Districts | 87,101 |
| State Senate Districts | 44 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 38.38% |
| African American | 48.77% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 12.85% |