KMSO (102.5 FM) is a silent commercial radio station in Missoula, Montana.

[2] KMSO was locally owned, by Sheila Callahan & Friends, Incorporated, and serves Western Montana.

The station became KMSO when the call letters became available, as MSO is the airport code for Missoula.

The station started out playing easy listening music.

KMSO signed off the air on New Year's Eve 2024, as owner Sheila Callahan retired from radio broadcasting.