KBSU (90.3 FM) is a radio station licensed to Boise, Idaho. The station is owned by Boise State University, and is the flagship affiliate of Boise State Public Radio's "Music" network.

The station airs classical music and other entertainment programming from American Public Media and Public Radio International.

KBSU broadcasts in HD.

KBSU's programming is repeated on KBSM in McCall, Idaho. The station's signal is also relayed by the following translator stations.

43°45′22″N 116°05′56″W / 43.756°N 116.099°W / 43.756; -116.099