The California Interscholastic Federation-Southern Section (CIF-SS) is the governing body for high school athletics in most of Southern California and is the largest of the ten sections that comprise the California Interscholastic Federation (CIF). Its membership includes most public and private high schools in Orange, Los Angeles, Riverside, San Bernardino, Ventura, and central and southern Santa Barbara counties. At the start of the 2018/9 season, 13 schools from San Luis Obispo County and northern Santa Barbara County left the Southern Section to join the much smaller CIF Central Section. Teams from the Los Angeles Unified School District (LAUSD) and surrounding areas have competed in the CIF Los Angeles City Section since 1935. CIFSS's offices are located in Los Alamitos.