Both KSOP and KSOP-FM have broadcast country music since their first air dates. The station was founded in 1955 by Henry Hilton, a Utah native who had worked in other local radio stations before starting KSOP.[4] KSOP initially operated during the day only. Today the Hilton family continues operating KSOP and KSOP-FM.
From December 1964 through spring 2002, KSOP was a simulcast of KSOP-FM. Around June 26, 2002, KSOP - AM flipped to the current classic country format.[5][6]