Quanah
- County:
- Hardeman County
- County Seat:
- Yes
- Area (mi²):
- 3.476
- State:
- Texas
Quanah is a city located in Hardeman County, Texas. Quanah has a 2026 population of 2,181. It is also the county seat of Hardeman County. Quanah is currently declining at a rate of -1.67% annually and its population has decreased by -4.59% since the most recent census, which recorded a population of 2,286 in 2020.