KTSM (690 kHz) is a commercial AM radio station licensed to El Paso, Texas. It is owned by iHeartMedia, Inc. and airs a news/talk format. The studios are on North Mesa Drive in west central El Paso.

KTSM broadcasts with 10,000 watts around the clock. Because the station operates on 690 AM, a Mexican and Canadian clear-channel frequency, KTSM uses a directional antenna with a four-tower array to avoid interfering with other stations operating on the same frequency. Its transmitter site is located off O'Brian Street near U.S. Route 54 in north east El Paso.^[2]

KTSM has one local show on weekdays, Talk El Paso with Andrew Polk, heard in afternoon drive time. The rest of the schedule is made up of nationally syndicated talk shows, mostly supplied by Premiere Networks, a subsidiary of iHeartMedia: The Glenn Beck Program, The Clay Travis and Buck Sexton Show, The Sean Hannity Show, The Jesse Kelly Show, The Mark Levin Show, Coast to Coast AM with George Noory and This Morning, America's First News with Gordon Deal.

Weekends feature a mix of local and syndicated shows on money, health, technology, travel, home repair and the law. Weekend programs include The Kim Komando Show, Bill Handel on The Law, At Home with Gary Sullivan, Beyond the Beltway with Bruce DuMont, Sunday Nights with Bill Cunningham, The Travel Show with Larry Gelwix and Somewhere in Time with Art Bell. Some weekend hours are paid brokered programming. Most hours begin with an update from Fox News Radio.

In 1947, the station signed on the air in El Paso at 690 kHz as KEPO.^[3] It was powered at 5,000 watts and owned by H.J. Griffith, who served as station president.

In 1957 its call letters were changed to KHEY, airing a country music format for many years. Historically, KHEY was one of several country music stations in the El Paso, Texas market, and was the last AM station in the market to keep its country format.

In 1998, San Antonio-based Clear Channel Communications (renamed iHeartMedia in 2014), acquired both KHEY-AM-FM and KTSM-AM-FM. Under Clear Channel management, the two AM stations' call signs and formats were swapped in 2000, with KHEY on AM 690 becoming KTSM and inheriting its talk format, while KTSM on AM 1380 became KHEY and inherited its country music format.