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KSFI is a radio station operating at frequency 100.3 FM in Salt Lake City, Utah, United States. KSFI maintains studio facilities located at the KSL Broadcast House building in Salt Lake City's Triad Center (which also house KRSP-FM and the KSL-AM-FM-TV partners), and its transmitter is located on Farnsworth Peak in the Oquirrh Mountains, southwest of Salt Lake City.

KSFI FM 100.3 logo.png
CitySalt Lake City, Utah
Broadcast areaSalt Lake City-Ogden-Provo, Utah
BrandingFM 100.3
SloganBetter Music For A Better Workday
Better Music For A Better Holiday (Nov.-Dec.)
Frequency100.3 MHz (also on HD Radio)
First air dateDecember 6, 1946; 72 years ago (December 6, 1946) (as KSL-FM)
FormatAdult Contemporary
Christmas music (Nov.-Dec.)
ERP25,000 watts
HAAT1,140 meters (3,740 ft)
Facility ID60452
Callsign meaningK Simmons Family Inc. (Former owners)
Former callsignsKSL-FM (1946–1979)
OwnerBonneville International
(Bonneville International Corporation)
Sister stationsKRSP-FM, KSL (AM), KSL-FM, KSL-TV
WebcastListen Live

The station's original call letters were KSL-FM when it began broadcasting in December 1946 as the sister station of KSL. Originally owned by the Deseret News, it became a part of Bonneville International when the LDS Church formed it as the parent of its broadcasting outlets in 1964.

"FM 100" was a pioneer of Bonneville's "beautiful music" format, but in 1978 it was sold to Simmons.[1] Simmons changed the call letters in 1979 to KSFI (Simmons Family Incorporated) and began adding more vocal selections to the music mix, eventually evolving the format to soft adult contemporary. Bonneville reacquired the station (along with Star 102.7 and Arrow 103.5) from Simmons in 2003.[1] According to the website of its owner, Bonneville International, FM100 is the top-performing adult contemporary station in Utah.




  1. ^ a b Arave, Lynn. "Bonneville purchase of 15 stations OK'd", Deseret News, December 9, 2003. Retrieved February 26, 2017.

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