Sentinel
- County:
- Washita County
- County Seat:
- No
- Area (mi²):
- 0.622
- State:
- Oklahoma
Sentinel is a town located in Washita County, Oklahoma. Sentinel has a 2026 population of 755. Sentinel is currently growing at a rate of 1.07% annually but its population has decreased by -0.92% since the most recent census, which recorded a population of 762 in 2020.