Granite Hills High School, established in 1999, is one of the eleven high schools in Porterville, Tulare County, California. Jacob Bowker is the principal. A previous principal was Apolinar Marroquin. 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. The school offers an "Academy of Law Justice and Ethics" program. In 2022, students from the school's Academy of Law Justice and Ethics investigated a simulated murder scene In 2018, a student stabbed himself.