Granite Hills High School, established in 1999, is one of the eleven high schools in Porterville, Tulare County, California.

Its online newspaper, the Grizzly Gazette, was a top million finalist in the National Scholastic Press Association Pacemaker Competition in the 2005–06 school year and were winners the following two years.---- The Granite Hills Academic Decathlon team won the Tulare County Academic Decathlon Regional Championship for the 6th consecutive year.

he school's girls soccer team forfeited a game in 2022 because of the other team included a transgender athlete.

[4][5] The school offers an "Academy of Law Justice and Ethics" program.

[6] In 2022, students from the school's Academy of Law Justice and Ethics investigated a simulated murder scene[7] In 2018, a student stabbed himself.