| Whiteoak High School | |
| Location: | Mowrystown |
| Streetaddress: | 44 North High Street |
| Zipcode: | 45155 |
| Country: | USA |
| District: | Bright Local Schools |
| Superintendent: | Michael Bick |
| Principal: | Jason Iles |
| Avg Class Size: | 43 |
| Conference: | Southern Hills Athletic Conference |
| Song: | On, Wisconsin! |
| Mascot: | Wildcat |
| Sports: | Cross Country, Golf, Volleyball, Basketball, Bowling, Cheerleading, Track & Field, Baseball and Softball |
| Team Name: | Wildcats[1] |
| Yearbook: | Prowler |
| Newspaper: | Weekly Wildcat |
| Opened: | 1938-39 (Present High School - expanded in 1986 and 2000.) |
| Enrollment: | 173[2] |
| Enrollment As Of: | 2022-23 |
| Free Text3: | Michelle Gleim |
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 15:1. The school mascot is the Wildcat. The high school and junior high are in the same building.
Whiteoak competes in the Southern Hills Athletic Conference and is a member of the Ohio High School Athletic Association. Whiteoak offers a variety of sports, such as cross country, golf, volleyball, basketball, bowling, cheerleading, baseball, softball, and track & field.