
O'Brien
- County:
- Haskell County
- County Seat:
- No
- Area (mi²):
- 0.504
- State:
- Texas
O'Brien is a city located in Haskell County, Texas. O'Brien has a 2025 population of 87. O'Brien is currently declining at a rate of 0% annually and its population has decreased by -2.25% since the most recent census, which recorded a population of 89 in 2020.
The average household income in O'Brien is $42,674 with a poverty rate of 64.81%. The median age in O'Brien is 24.3 years: 18.6 years for males, and 33.7 years for females.