MLS Cup 2004 was the ninth edition of the MLS Cup, the championship match of Major League Soccer (MLS), which took place on November 14, 2004, at the Home Depot Center in Carson, California. It was contested between D.C. United and the Kansas City Wizards to decide the champion of the 2004 season. The two teams had qualified for the playoffs after seasons with mixed results that ended in top-two finishes in their respective conferences.