| Granite Hills High School | |
| Motto: | "Be Respectful, Be Safe, Be Accountable." |
| Established: | 1999 |
| Type: | Public secondary |
| Principal: | Adam Powell |
| Teaching Staff: | 78.82 (FTE) |
| Ratio: | 22.32 |
| Enrollment: | 1,759 (2022-23)[1] |
| Grades: | 9-12 |
| Streetaddress: | 22900 Esaws Rd |
| City: | Apple Valley |
| State: | California |
| Country: | USA |
| District: | Apple Valley Unified School District |
| Accreditation: | 3-Year WASC |
| Nickname: | Cougs |
| Mascot: | Cougar |
| Free Label: | Emblem |
| Rival: | Apple Valley High School |
| Newspaper: | The Granite Planet |
Granite Hills High School is a public high school located in Apple Valley, California and is part of the Apple Valley Unified School District. The school was established in 1999 to relieve pressure on the crowded Apple Valley High School.
The school's sports teams are called Granite Hills Cougars and compete in the Desert Sky League of the CIF Southern Section.The school has been competing in the Desert Sky League Since 2000.