Whiteoak High School is a public high school in Mowrystown, Ohio, USA, and the only high school in the Bright Local Schools district. The student-teacher ratio is 17:1. The school mascot is the Wildcat. The high school and junior high are in the same building.

Mowrystown is a village in Highland County, Ohio, United States. The population was 385 at the 2020 census.