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WMRN (1490 AM) is a radio station broadcasting a news talk information format. Licensed to Marion, Ohio, United States, ("MRN" stands for Marion Radio News) the station serves the Mid-Ohio area. The station is owned by iHeartMedia, Inc., through licensee iHM Licenses, LLC, and features programming from Fox News Radio and Premiere Networks.

The station was launched December 23, 1940. As the first station to broadcast from Marion, WMRN has traditionally been viewed as Marion County's "home" radio station.

In May 1953, WMRN's owners launched an FM sister station WMRN-FM which played "Beautiful Music" format until its format was converted to Country & Western on April 1, 1981. Clear Channel Communications separated the AM operations from the FM station, and then sold WMRN-AM to its current owner.