KDFC (89.9 FM) is a non-commercial radio station licensed to Angwin, California, USA, and serving the Santa Rosa area. The station broadcasts a classical music format, simulcasting KOSC in San Francisco. The programming is also simulcast on KXSC in Sunnyvale, serving the San Jose area and parts of southern San Mateo and Southern Alameda Counties. The three stations are all branded as "KDFC", and are both owned by the University of Southern California, via its Classical Public Radio Network.