WTJU is a College Radio-formatted broadcast radio station licensed to Charlottesville, Virginia, serving Charlottesville and Albemarle County, Virginia. WTJU is owned and operated by the University of Virginia.

WTJU was founded in 1955 when the University of Virginia’s Department of Speech and Drama decided to start an educational radio station to serve the larger community. WUVA, the university's carrier current AM radio station, had been broadcasting popular music to students since 1947. The Kappa Delta Pi fraternity put up a large part of the funds necessary to get the station off the ground. On May 10, 1957, WTJU went on the air at 91.3 FM with a classical music format and was able to broadcast throughout Charlottesville, building a small but dedicated group of listeners.

In 1959, the station aired its first ever music marathon: the Classical Marathon, held during UVA’s exam period. In 1963, WTJU became a full-fledged student organization, separate from the university's Department of Speech and Drama. By 1971, WTJU began broadcasting rock music, as well as some jazz and folk programs. By 1974, WTJU was broadcasting 24 hours a day and also allowed non-students to be DJs in order to keep the station broadcasting 24/7 year-round.

In 1993, WTJU's license was threatened when student administrators accidentally violated FCC rules in filing a routine document. The Dean of Students office insisted the station hire its first paid staff member, general manager Chuck Taylor, requiring a transition from an independent student organization – the model followed by WUVA – to direct oversight from the university. In the same year, WTJU changed its frequency from 91.3 to 91.1 FM. In the late 1990s, planned construction at UVA's Peabody Hall forced WTJU to relocate into studios in Lambeth Commons. By 2010, WTJU had also started streaming its radio programming over the internet.

Taylor retired in 2010. At the time, the station had low listenership and was in deep financial trouble. Administrators pressed ahead with a search for new management, even as the university's Board of Visitors approved turning in the station's license if they did not see a path to viability. Burr Beard was hired as Taylor's replacement in April 2010. Beard proposed sweeping changes to the station’s operation: abandoning the longstanding freeform scheduling policy in favor of a focus on "Americana" music; moving specialty jazz and rock programs to evening and late night, respectively; eliminating classical music altogether; and instituting a small rotation of four songs per hour. Beard's proposals led to backlash from both volunteers and listeners, who feared the potential loss of the station's identity and cancellations of specialty shows. Beard resigned in October 2010 without implementing any changes and the station began its search for a new manager. In 2011, Nathan Moore was hired and is the current general manager. The station has seen a resurgence of interest and increased fundraising in the following years.

In 2011, WTJU participated in the first-ever College Radio Day.

In 2012, WTJU aired a live remote broadcast of the "Rally on the Lawn" demonstration against the ouster of UVA President Teresa A. Sullivan. Also in 2012, WTJU aired a special modern adaptation of The War of the Worlds on Halloween night.

On February 1, 2015, WTJU entered into a three-year local marketing agreement with WHAN (1430 AM) in Ashland, Virginia. WTJU's programming was rebroadcast on WHAN and its FM translator (W275BQ, 102.9 FM) to cover the city of Richmond with a broadcast signal. WTJU exited the agreement early on August 16, 2017, as the signal was found to be inadequate and the increase in underwriting from the Richmond market did not offset the cost.