The 2005 NFL season was the 86th regular season of the National Football League.
Regular season play was held from September 8, 2005 to January 1, 2006. The regular season also saw the first ever regular season game played outside the United States, as well as the New Orleans Saints being forced to play elsewhere due to damage to the Superdome and the entire New Orleans area by Hurricane Katrina.
The playoffs began on January 7. The New England Patriots' streak of 10 consecutive playoff wins and chance at a third straight Super Bowl title was ended in the Divisional Playoff Round by the Denver Broncos, and eventually the NFL title was won by the Pittsburgh Steelers, who defeated the Seattle Seahawks 21–10 in Super Bowl XL at Ford Field in Detroit, Michigan on February 5 for their fifth Super Bowl win. This also marked the first time that a sixth-seeded team, who by the nature of their seeding would play every game on the road, would advance to and win the Super Bowl.
The season formally concluded with the Pro Bowl, the league's all-star game, at Aloha Stadium in Honolulu, Hawaii on February 12.