Klein Oak High School is accredited by the Texas Education Agency and the Southern Association of Colleges and Schools.
Klein Oak is one of four high schools in the Klein ISD. Klein ISD covers 97.5 square miles of north Harris County. Approximately 100,000 people reside within the district.
Klein Oak High School is located in the northern part of the district in a small residential suburban community. It is approximately 45 minutes from downtown Houston. Klein Oak High School is composed of grades 9-12 with an enrollment of approximately 3700 students.