What's the name of the high school in Grease?

The answer is: Rydell High School. Rydell High School — or just Rydell High if you're in the know — is where Sandy and Danny live out their love-torn drama.A conglomeration of real-life Los Angeles area schools was used to create this fictional setting — so no, there isn't a single school that has mid-century charm, pristine football fields, and plenty of room for an entire carnival.Source