WrestleMania IV was the fourth annual WrestleMania professional wrestling pay-per-view (PPV) event produced by the World Wrestling Federation (WWF, now WWE). It took place on March 27, 1988, at Trump Plaza in Atlantic City, New Jersey. The announced attendance of the event was 19,199, drawing a 6.5 buyrate on PPV.

The main event featured the finals of a one-night, 14-man single-elimination tournament for the WWF World Heavyweight Championship, in which Macho Man Randy Savage defeated "The Million Dollar Man" Ted DiBiase to win the vacant title. This marked the first WrestleMania that did not feature Hulk Hogan - regarded as the WWF's biggest star in the 1980s - as a participant in the main event (though he was at ringside in Savage's corner).

The undercard featured a 20-man battle royal won by Bad News Brown, Demolition (Ax and Smash) versus Strike Force (Tito Santana and Rick Martel) for the WWF Tag Team Championship, and Brutus "The Barber" Beefcake versus The Honky Tonk Man for the WWF Intercontinental Heavyweight Championship.