WCFS-FM (105.9 MHz) – branded Newsradio 105.9 WBBM – is a commercial all-news radio station licensed to the Chicago suburb of Elmwood Park, Illinois.

Owned by Audacy, Inc., the station services the Chicago metropolitan area, operating as a full-time simulcast of WBBM (780 AM).

[7][8] In addition to a standard analog transmission, WCFS-FM broadcasts over two HD Radio subchannels,[9] and is available online via Audacy.

[3] In 1957, the station was sold to Evelyn Chauvin Schoonfield, a school teacher from Detroit, for $22,500, and its call sign was changed to WXFM.

[15] However, the FCC allowed Schoonfield to keep the license, and authorized the sale of the station to WXFM Inc., with controlling interest owned by Robert Victor.

[26][27] Dick Lawrence, historian and radio personality, hosted "Sound of the 1920s" an original hour-long feature program of vintage music 'old scratchies' woven together by offbeat historical themes.

[28] Count Bee-Jay's "Journeys Into Music", broadcast from a truck stop at 39th and Morgan to the radio station was a daily feature on WXFM from the 70s into the early 80s.

[37][38][39] On April 2, 1984, Cox launched a contemporary hits format on the station, and its call sign was changed to WAGO.

[44][45][46][47] On-air personalities included Stephanie Miller, John Howell, Mitch Michaels, Allan Stagg, Joe Thomas, Debbie Alexander, and Rich Koz.

[50] After Stern tried to foment a local rivalry with the locally-based Mancow Muller on WRCX by attacking the personality, his boss, and their families, Cox dropped the show in October 1995.

[51][52] The station blamed issues with "some of Howard's on-air content", and one day later, it was picked up by WJJD, then owned by Infinity Broadcasting, who distributed the show.

The station began evolving to a hot talk format in July 1996 with the addition of Steve Dahl in the afternoons and Stern returning to mornings, while classic rock continued to air in the remainder of the schedule.

[57][58][59] In 1998, Jonathon Brandmeier began hosting middays on WCKG, and the station further moved into a hot talk format.

[63][62] Other personalities and programs during this era include, Patti Haze & Mary Pat LaRue,[60] Pete McMurray,[61] Opie and Anthony,[62] Karen Hand and Dr. Kelly Johnson,[64] Bill O'Reilly,[64] Jim Cramer,[64] Buzz Kilman,[64] Wendy Snyder,[64] Frankie "Hollywood" Rodriguez,[64] Bob Sirott,[64] Marianne Murciano,[64] Little Steven's Underground Garage,[64] and The House of Blues Radio Hour with Elwood Blues.

[67][68][69] With Stern's departure from terrestrial radio on December 16, 2005, Infinity announced that effective January 3, 2006, WCKG would become the flagship station of Rover's Morning Glory, a show that originated from Cleveland and outside of moving to Chicago, held no previous connection to the Windy City and focused on a much younger audience than the rest of WCKG's staff, meaning the remaining audience which had not moved with Stern to satellite radio and other programs didn't stick around for the rest of the station's schedule.

[67] Following months of abysmal ratings, Rover's Morning Glory was dropped on August 1, 2006, and was replaced by the New York-based Opie and Anthony Show.

[76] By this time, the weekday lineup consisted of Opie and Anthony, Meier, Stan Lawrence and Terry Armour, Steve and Matt Dahl, Glenn Beck, Loveline, and Bill O'Reilly.

[78] However this was a ruse, designed to throw long-time ratings leader 93.9 WLIT-FM off from its plans to start playing all-Christmas music beginning November 8.

[88] On March 30, 2010, it was announced that Bill Gamble left CBS Radio Chicago, where he was Program Director of WCFS-FM and WUSN.

[90] Then at 8:10 a.m., WCFS replaced the "Fresh" AC format with an FM simulcast of co-owned all-news station 780 WBBM.

[91][92] Until that date, WBBM had been carried on WCFS-HD2, effectively (besides the loss of WCFS's physical staff) making the move merely a swap of the formats for the HD1 and HD2 subchannels.

Arbitron's use of the Portable People Meter for Chicago radio ratings does not need call letter verification to give credit for listening to 105.9 FM.