Archbishop Mitty High School is a private Catholic high school located in San Jose, California, United States. The school is named for John Joseph Mitty, the fourth Archbishop of San Francisco. It is the first and only Diocesan Catholic high school in the Santa Clara Valley. Construction of the school began in 1963, and when completed, the campus occupied its present 24 acres (9.7 ha).

John Joseph Mitty was an American prelate of the Roman Catholic Church. He served as the third Bishop of Salt Lake City (1926–1932) and the fourth Archbishop of San Francisco (1935–1961).