KSTP-TV (channel 5) is a television station licensed to Saint Paul, Minnesota, United States, serving the Twin Cities area as an affiliate of ABC. It is the flagship television property of locally based Hubbard Broadcasting, which has owned the station since its inception, and is sister to Minneapolis-licensed independent station KSTC-TV (channel 5.2) and radio stations KSTP (1500 AM), KSTP-FM (94.5), and KTMY (107.1 FM). The five outlets share studios on University Avenue, on the Saint Paul–Minneapolis border; KSTP-TV's transmitter is located at Telefarm Towers in Shoreview, Minnesota.

KSTP-TV operates two full-power satellite stations: KSAX (channel 42) in Alexandria (with transmitter near Westport), and KRWF (channel 43) in Redwood Falls (with transmitter near Vesta). KSTP-TV also serves as the default ABC affiliate for the Mankato market, as that area does not have an ABC affiliate of its own. The station's signal is also relayed in St. James, Minnesota, over translator K30FN-D, which also serves the Mankato market.

Nielsen Media Research treats KSTP-TV and its satellites as one station in local ratings books, using the identifier name KSTP+.

Stanley E. Hubbard, founder of KSTP radio, was one of broadcasting's foremost pioneers. In June 1939, he purchased one of the first television cameras available from RCA and began experimenting with television, but the television blackout brought on by World War II prevented any transmissions from being made. The first telecast by KSTP-TV reportedly occurred on December 7, 1947, when Jack Horner hosted a 25-minute program. On April 27, 1948, KSTP-TV signed on as the first commercial television station in Minnesota, although an experimental mechanical television station had been set up by WDGY station engineers more than a decade earlier. That station's license expired in 1938 as the Federal Communications Commission (FCC) was not interested in continuing mechanical TV broadcasts.

KSTP-TV was originally an NBC affiliate, as KSTP radio had been an affiliate of the NBC Red Network since 1928. Channel 5 claims to have been the NBC television network's first affiliate located west of the Mississippi River; however, this distinction is actually held by KSD-TV (now KSDK) in St. Louis, which signed on one year earlier. (Also, both the studios and the transmitter are located east of the river.) It was part of NBC's Midwest Network, a regional group of NBC affiliates that fed programming in the days before the coaxial cable link to New York City. In 1961, due to its status as an NBC affiliate, it was the first television station not owned by a network to broadcast all of its local programs in color.

In the mid-1970s, ABC—which had become the top-rated television network in the United States—began looking for stronger affiliates across the country. KMSP-TV (channel 9), the Twin Cities' ABC affiliate since 1961, had long struggled in the ratings. ABC had approached independent station WTCN-TV (channel 11, now KARE), CBS affiliate WCCO-TV (channel 4), and KSTP-TV to affiliate with the network. Channel 5 surprised the industry on August 29, 1978, by announcing its intention to sever ties with then third-place NBC after 30 years to join ABC. The affiliation switch occurred on March 5, 1979, and was ABC's biggest coup at the time; the NBC affiliation subsequently went to WTCN-TV that same day. One of the last prime time NBC programs to air on channel 5 was The Wonderful World of Disney; the first ABC program to air in general on the station was Good Morning America, as announced by then-news anchor Tom Ryther. Later on, the first prime time ABC program to air on the station was a first-run episode of the short-lived series, Salvage 1. "We want to go into the 1980s in a leadership position with a network which we think has the management, team and depth to be the best. That's ABC. We're just absolutely thrilled," said KSTP's Stanley S. Hubbard, son of station founder Stanley E. Hubbard.

In 2000, Hubbard Broadcasting purchased independent station KVBM-TV (channel 45; now KSTC), creating Minnesota's first commercial television station duopoly (though there is a longstanding public television duopoly: KTCA/KTCI).^{[citation needed]}

KSTP-TV has used its "groovy 5" logo or variations on it since April 1969—it is the longest-used station logo in the Upper Midwest. By 1982, the design contained a white '5' on a red rounded edge square background. The number was italicized for a time in the mid-to-late 1980s. In the early 1990s, the logo endured a more dramatic makeover, with a gold colored '5' on a blue ABC-style disc (with either the call letters or the Eyewitness News name imprinted upon it), with the center colored in green. By the late 1990s, a brighter logo—still with a gold '5'—returned to the rectangular look, adding a black ABC logo. In the 2000s through mid-2010s, a white '5' was used on a red parallelogram, also featuring the ABC logo. On November 30, 2014, the logo was redesigned, and now features the "groovy 5" logo in blue with red lines circling the left part of the logo, with the ABC logo again. On March 22, 2021, the logo got its current redesign, putting a white 5 inside a red "app" shaped square with rounded corners (an updated version of the 1982–1986 logo), similar to the logo used in the 2000s. An updated graphics and music package debuted on the same day.