Tempe High School is located in Tempe, Arizona, approximately one mile south of Arizona State University. Tempe Union High School was established by a vote of the people of Tempe in 1907. Classes were held in rented space in downtown Tempe for the 1908-09 school year, as the school's permanent location was built. The first building opened in the fall of 1909 on the southeast corner of Mill and University (today as the Tempe Towne Center). The school has recently been the beneficiary of a $25 million renovation project for the Fine Arts Complex, a State-of-the-art fitness center, outdoor amphitheater and courtyards.
Tempe High's enrollment generally fluctuates between 1,300 and 1,400 students. THS offers a wide variety of curriculum, including an honors Curriculum, the International Baccalaureate program, and H.O.P.E. which allows students to explore and train for medical professions by partnership with Tempe St. Luke’s Hospital.
Centennial events include: Athletic Hall of Fame dinner, Homecoming parade down Mill Avenue, Back to the Future celebration, and the Embassy Suites Blue and White Bash.
Upon the opening of Tempe's second high school, McClintock High, an intense rivalry began between the two schools for many, many years. The THS vs. MHS football and basketball games had to be played at ASU facilities well into the late 1970's because the individual schools' stadiums and gymnasiums were not nearly large enough to house the large crowds.