KSMA-FM is a radio station airing a country music format licensed to Osage, Iowa, broadcasting on 98.7 MHz FM.

In middays, Classic Country format weekdays called 'Lunch With The Legends', showcasing artists like Johnny Cash, Patsy Cline, Waylon Jennings, and many more.

On July 1, 1989, KOSG changed call letters to KCZY, and was part of a four station simulcast that included KCZQ in Cresco, KCZE in New Hampton, and KCHA-FM in Charles City.

The new format competed against hot adult contemporary-formatted KLSS, which served as the default contemporary hit music station for North Iowa, and Rochester, Minnesota-based KROC-FM, whose signal covers much of the area.

In February 2002, the station's power was increased to 25,000 watts, in order to improve its coverage into Mason City and Clear Lake.