The 2006 Judgment Day was the eighth Judgment Day professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE). It was held exclusively for wrestlers from the promotion's SmackDown! brand division. The event took place on May 21, 2006, at the US Airways Center in Phoenix, Arizona. It was the final Judgment Day to be brand-exclusive as following WrestleMania 23 the following year, brand-exclusive PPVs were discontinued. The event also featured the finals of the 2006 King of the Ring tournament.

In the main event, World Champion Rey Mysterio defeated John "Bradshaw" Layfield (JBL) following a Frog splash. One of the predominant matches on the undercard was Booker T versus Bobby Lashley in the finals of the King of the Ring tournament, which Booker won after interference from Finlay. Another primary match was Kurt Angle versus Mark Henry, which Henry won after Angle was counted out. The theme song "This Fire Burns" was temporarily used as the theme song for Randy Orton, but later became the official theme song for CM Punk until 2011.