High School Musical: The Musical: The Series is an American mockumentary musical drama television series created for Disney+ by Tim Federle, inspired by the High School Musical film series. The series is produced by Chorus Boy and Salty Pictures in association with Disney Channel. Oliver Goldstick served as showrunner for the first four episodes; he was succeeded by Federle for the remainder of the first season and thereafter.

Set at a fictionalized version of East High School, the school at which the original movies were filmed, the first season follows a group of teenage theater enthusiasts who participate in a staging of High School Musical: The Musical as their school production. The series showcases a different featured musical in each following season, and explores the lives of the characters as they navigate friendships, love, interests, identity, and family relationships. The series stars Olivia Rodrigo, Joshua Bassett, Matt Cornett, Sofia Wylie, Larry Saperstein, Julia Lester, Dara Reneé, Frankie Rodriguez, Mark St. Cyr, Kate Reinders, Joe Serafini, Saylor Bell Curda, Adrian Lyles and Liamani Segura. Several cast members from the original film series also appear in guest roles as fictionalized versions of themselves.

High School Musical: The Musical: The Series premiered on Disney Channel, ABC, and Freeform as a preview simulcast on November 8, 2019, ahead of its launch on Disney+ on November 12; its first season consisted of 10 episodes. Before the series debuted, it was renewed by Disney+ for a second season of 12 episodes that premiered in May 2021. The third season consisting of eight episodes premiered in July 2022. The fourth and final season consisting of eight episodes premiered in August 2023. Critical reviews have highlighted the performances of the cast, particularly those of Bassett and Rodrigo, and compared the series to Glee for its music and themes. There has been a mixed reception to the program's mockumentary format. The series won a GLAAD Media Award, six Nickelodeon Kids' Choice Awards, and was nominated for fourteen Children's and Family Emmy Awards, winning once for Outstanding Original Song for a Children's or Young Teen Program.