KBYU-FM (89.1 MHz) is a classical music radio station run by Brigham Young University in Provo, Utah.

Its transmitting tower is located on a peak of the Oquirrh Mountains northwest of the university campus, and southwest of Salt Lake City.

Using his experience as a radio and radar technical during World War II, it became available across Provo and the surrounding area in 1948 by using the city's power lines as an antenna.

[9] On October 23, 2017, Brigham Young University announced that KBYU-FM and KBYU-TV would drop their existing programming and become full-time outlets for BYU Radio and BYUtv respectively.

The planned flip of KBYU-FM was met with criticism from listeners, as it was the only terrestrial radio station in the market devoted to classical music.

On April 26, 2018, the university announced that it would instead purchase 107.9 KUMT to use as a full-time outlet for BYU Radio, allowing it to maintain KBYU-FM's classical format.