KQED, virtual channel 9 (UHF digital channel 30), is a Public Broadcasting Service (PBS) member television station licensed to San Francisco, California, United States and serving the San Francisco Bay Area. The station is owned by Northern California Public Broadcasting, through subsidiary KQED, Inc., alongside fellow PBS station KQEH (channel 54) and National Public Radio (NPR) member KQED-FM (88.5). The three stations share studios on Mariposa Street in San Francisco's Mission District and transmitter facilities atop Sutro Tower.
KQET (virtual and UHF digital channel 25) in Watsonville operates as a full-time satellite of KQED, serving the Monterey/Salinas/Santa Cruz market. This station's transmitter is located at Fremont Peak, near San Juan Bautista. The station was formerly a satellite of KTEH in San Jose until 2007.
KQED was organized and founded by veteran broadcast journalists James Day and Jonathan Rice on June 1, 1953, and first signed on the air on April 5, 1954, as the fourth television station in the San Francisco Bay Area and the sixth public television station in the United States, debuting shortly after the launch of WQED in Pittsburgh, Pennsylvania. The station's call letters, Q.E.D., are taken from the Latin phrase, quod erat demonstrandum, commonly used in mathematics.