The city is served by the Montebello Unified School District. M.U.S.D. serves the city of Montebello, portions of the cities of Bell Gardens, Commerce, Downey, Rosemead, Pico Rivera, and Monterey Park, as well as the unincorporated community of South San Gabriel, and a part of the unincorporated community of East Los Angeles. The District is one of the largest and most diverse in Los Angeles County with an enrollment of more than 35,000 K–12 students and 30,000 adults enrolled in adult education.