Diegueno Middle School is one of five schools in the San Dieguito Union High School District serving grades 7 and 8. It opened in 1985 and can accommodate 850 students. The required core curriculum includes math, English, history, science, physical education and an elective, which may include Spanish, digital art, multimedia, drama, band and more. Diegueno has been recognized twice as both a California Distinguished School and a National Blue Ribbon school. The mascot is the cougar, and its colors are blue and gold.