The 2008 Judgment Day was the 10th Judgment Day professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE). It was held for wrestlers from the promotion's Raw, SmackDown, and ECW brand divisions. The event took place on May 18, 2008, at the Qwest Center Omaha in Omaha, Nebraska.

The event's card featured seven matches. The main event was for Raw's WWE Championship, in which Triple H defeated Randy Orton in a Steel Cage match to retain the title. In SmackDown's main match, The Undertaker defeated Edge by countout, but did not win the vacant World Heavyweight Championship because unless stipulated, championships do not change hands via countout or disqualification. In ECW's main match, WWE Tag Team Champions John Morrison and The Miz defeated ECW Champion Kane and CM Punk to retain the titles. From the six scheduled bouts on the undercard, two received more promotion than the others; these bouts included two singles matches, in which Shawn Michaels defeated Chris Jericho and John Cena defeated John "Bradshaw" Layfield (JBL), respectively.

Judgment Day received 252,000 pay-per-view buys, and was instrumental in helping WWE increase its pay-per-view revenue by $21.9 million compared to the previous year. The professional wrestling section of the Canadian Online Explorer website rated the entire event 6 out of 10, higher than the 2007 event, which was marked "as an average show". It was also the first Judgment Day PPV broadcast in high definition.