WrestleMania X8, also known as WrestleMania 18, was a 2002 professional wrestling pay-per-view (PPV) event produced by the World Wrestling Federation (WWF, now WWE). It was the 18th annual WrestleMania and took place on St Patrick’s Day on March 17, 2002, at the SkyDome in Toronto, Ontario, Canada, the second WrestleMania at that venue after WrestleMania VI in 1990. The event marked the last WrestleMania event held under the WWF name, as the company was renamed to World Wrestling Entertainment (WWE) two months later. It was also the last WrestleMania held before the introduction of the brand extension just a week after the event.

Eleven matches were contested at the event. The Rock defeated Hollywood Hulk Hogan in the main attraction dubbed "Icon vs. Icon", while in the final match, Triple H defeated Chris Jericho to win the Undisputed WWF Championship. In other prominent matches on the undercard Stone Cold Steve Austin defeated Scott Hall, The Undertaker defeated Ric Flair in a no disqualification match, and Rob Van Dam defeated William Regal to win the WWF Intercontinental Championship.

The record-breaking attendance for the SkyDome of 68,237 grossed approximately $6.1 million CAD ($3.9 million USD). WrestleMania weekend also included WWF Fan Axxess at the Canadian National Exhibition's Automotive Building.