Knox City-O'Brien Consolidated Independent School District

Knox City-O'Brien Consolidated Independent School District is a public school district based in Knox City, Texas (USA). In addition to Knox City, the district also serves the city of O'Brien. Located in southwestern Knox County, a portion of the district lies in northwestern Haskell County.

In 2009, the school district was rated "academically acceptable" by the Texas Education Agency.

Schools

 * Knox City High School (Grades 9–12)
 * 1983 Class A state football champions
 * O'Brien Middle (Grades 5–8)
 * previously O'Brien High School, which were the 1972 Texas state champions in six-man football, the first title ever awarded in this classification
 * Knox City Elementary (Grades PK-4)

Athletics
Knox City High School plays six-man football.