WIAT, virtual channel 42 (UHF digital channel 30), is a CBS-affiliated television station licensed to Birmingham, Alabama, United States. The station is owned by Irving, Texas-based Nexstar Media Group. WIAT's studios are located on Golden Crest Drive atop Red Mountain, next to the American General candelabra tower it shares with several central Alabama broadcast outlets (near the southern edge of Birmingham).

The history of the UHF channel 42 allocation in the Birmingham market traces back to 1949, when the Birmingham News Company, owners of The Birmingham News and Birmingham Age-Herald newspapers, applied for a construction permit with the Federal Communications Commission (FCC) for a television station license under the call letters WSGN-TV (for the "South's Greatest Newspaper"), which would have served as a sister station to radio station WSGN (610 AM, now WAGG; and 93.7 FM, now WDJC), owned by the News' Southern Broadcasting subsidiary. The station partnered with The Voice of Alabama, Inc., owners of WAFM-TV (channel 13, later WABT and WAPI-TV, and now WVTM-TV), to construct a broadcast tower next to its newly completed studio facility on Red Mountain, adjacent to Vulcan Park; plans called for WSGN-TV to operate from the radio stations' Radio Park building.