| Place Name | Oak Grove (Washington County) |
| Place Type | Census Designated Place |
| ZIP Code(s) | 37615 |
| County | Washington County |
| Area Code(s) | 423 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 4,180 |
| Population Growth Rate (2010-19) | 1.29% |
| Majority Ethnicity | White 94.63% |
| Metro/Micro Stats Area | Johnson City, TN |
| US Congressional District(s) | Tennessee 1st |
| State House Districts | 6 |
| State Senate Districts | 3 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 94.63% |
| African American | 2.85% |
| Hispanic | 1.37% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.15% |