Hollis
- County:
- Harmon County
- County Seat:
- Yes
- Area (mi²):
- 1.485
- State:
- Oklahoma
Hollis is a city located in Harmon County, Oklahoma. Hollis has a 2026 population of 1,665. It is also the county seat of Harmon County. Hollis is currently declining at a rate of -3.92% annually and its population has decreased by -6.57% since the most recent census, which recorded a population of 1,782 in 2020.