O'Brien is a city in Haskell County, Texas, United States. The population was 132 at the time of the 2000 census. As of 2010, the O'Brien population is 106. O'Brien is located at the junction of Farm Road 2229 and Texas State Highway 6; the nearest large city isAbilene, seventy miles to the south.
Location of OBrien, Texas
|Coordinates: 33°22′48″N 99°50′31″W|
O'Brien is located at (33.379922, -99.841812).
According to the United States Census Bureau, the city has a total area of 0.5 square miles (1.3 km2), all of it land.
The City of O'Brien is served by the Knox City-O'Brien Consolidated Independent School District.
In 1972, O'Brien won the first six-man football state championship in Texas.