Klein Oak High School, locally known simply as "Oak", is a nationally recognized Blue Ribbon public high school in unincorporated Harris County, Texas, United States. The school's principal is Thomas Hensley. It was established in August 1982 with Robert "Bob" West serving as its first principal.Klein Oak was the third high school established in Klein Independent School District to serve grades 9 through 12. It is administered by the school district and serves several areas of unincorporated Harris County, including WindRose, Augusta Pines, Northhampton, and Gleannloch Farms, which are zoned to Klein Oak.As of the 2014-15 school year, the school had an enrollment of 3,883 students and 230.2 classroom teachers (on an FTE basis), for a student–teacher ratio of 16.9:1. There were 771 students (19.9% of enrollment) eligible for free lunch and 221 (5.7% of students) eligible for reduced-cost lunch. Since 2004, the school has been home to the only International Baccalaureate Diploma Program in the district.HistoryKlein Oak High School was founded in 1982 by the Klein Independent School District under former district superintendent Dr. Donald Collins. The school's first principal was Robert West.