KQED (channel 9) is a PBS member television station licensed to San Francisco, California, United States, serving the San Francisco Bay Area. The station is owned by KQED Inc., alongside fellow PBS station KQEH (channel 54) and NPR member KQED-FM (88.5). The three stations share studios on Mariposa Street in San Francisco's Mission District and transmitter facilities at Sutro Tower.

KQET (channel 25) in Watsonville operates as a full-time satellite of KQED, serving the Santa Cruz–Salinas–Monterey market. This station's transmitter is located at Fremont Peak, near San Juan Bautista.

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. The station's call letters, Q.E.D., are taken from the Latin phrase, quod erat demonstrandum, commonly used in mathematics. The station was originally licensed to Berkeley, but changed its city of license to San Francisco on July 24, 1956.

In its early days following the station's sign-on, KQED broadcast only twice a week for one hour each day. Despite the very limited schedule, the station was still losing money, leading to a decision in early 1955 from its board of trustees to close down the station. Its staff got the board to keep the station on the air and tried to get needed funds from the public in a form of a televised auction, in which celebrities would appear to auction off goods and services donated to the station. While the station still came a little short, it did show that the general public cared to keep KQED on the air. Since then, the auction became a fund-raising tool for many public television stations, though its usage waned in recent years in favor of increased usage of special pledge drives throughout the year.

In 1970, KQED inherited KNEW-TV (channel 32) from Metromedia and changed the station's call letters to KQEC, but found they could not operate it without losing money. Various PBS and locally produced programs from KQED would air erratically and at different times of the day on KQEC. In 1988, the Federal Communications Commission (FCC) revoked KQED's license to operate KQEC, citing excessive off-air time, further charging dishonesty in previous filings with regard to the specific reasons. The alleged dishonesty was in reference to KQED's claim of financial woes for keeping KQEC off the air for most of 1972 through 1977, and again for several months in 1979 and 1980. After being revoked from KQED's hands, the reassigned license was granted to the Minority Television Project (MTP), one of the challengers of the KQED/KQEC filing. The KQEC call letters were changed to KMTP-TV under the new license.

During the early 1990s, when the state of California reintroduced the death penalty, the KQED organization waged a legal battle for the right to televise the forthcoming execution of Robert Alton Harris at San Quentin State Prison. The decision to pursue the videotaping of executions was controversial among those on both sides of the capital punishment debate.

KQED was co-producer of the television adaptation of Armistead Maupin's novel Tales of the City, which aired on PBS stations nationwide in January 1994. The original six-part series was produced by Britain's public-service Channel 4 Corporation with KQED and PBS' American Playhouse. The series featured gay themes, nudity, and illicit drug use in this fictional portrayal of life in 1970s San Francisco. Although the program gave PBS its highest ratings ever for a dramatic program, PBS bowed to threats of federal funding cuts and announced it would not participate in the television production of an adaptation of the second book in the series, More Tales of the City. The film division of KQED was founded by Irving Saraf.

With financial constraints looming, KQED announced in June 1995 that it would begin showing 30-second advertisements from corporate sponsors the following month.