WCW Monday Nitro, also known as WCW Nitro or simply Nitro, is an American professional wrestling television program that was produced by World Championship Wrestling (WCW) and broadcast weekly every Monday night on TNT in the United States from September 4, 1995 to March 26, 2001.

Created by Eric Bischoff and Ted Turner, the show's premiere was notable for sparking a period of television known as the "Monday Night Wars". For the entirety of the show's run, Nitro went head-to-head in the ratings with the World Wrestling Federation's (WWF; now WWE) Monday Night Raw. Although comparable to Raw in popularity from the beginning, Nitro began to dominate in ratings, based largely on the strength of the New World Order (nWo), a rebellious group of wrestlers that wanted to take over WCW. Beginning in June 1996, Nitro beat Raw in the ratings for 83 consecutive weeks, forcing WWF owner Vince McMahon to usher in the more adult-oriented "Attitude Era". In April 1998, Raw beat Nitro in the ratings for the first time in almost two years. The shows would continue to trade ratings wins back and forth until November 1998 when Raw pulled ahead of Nitro for good.

Besides broadcasting from various arenas and locations across the United States and Canada, such as Mall of America in Bloomington, Minnesota (from which the very first episode was broadcast), Nitro also organized special broadcasts from the Disney-MGM Studios in Orlando in 1996; aired annual Spring Break-Out episodes from Panama City Beach, Florida or South Padre Island, Texas starting in March 1997; and filmed some episodes in Australia and the United Kingdom during the Fall of 2000.

As of June 30, 2023, all episodes are available for streaming on the WWE Network and Peacock. WWE has also released three Best of WCW Monday Nitro DVD sets.