| Regular season | |
|---|---|
| Duration | September 9, 2004 – January 2, 2005 |
| Playoffs | |
| Start date | January 8, 2005 |
| AFC Champions | New England Patriots |
| NFC Champions | Philadelphia Eagles |
| Super Bowl XXXIX | |
| Date | February 6, 2005 |
| Site | ALLTEL Stadium, Jacksonville, Florida |
| Champions | New England Patriots |
| Pro Bowl | |
| Date | February 13, 2005 |
| Site | Aloha Stadium |
The 2004 NFL season was the 85th regular season of the National Football League (NFL).
With the New England Patriots as the defending league champions, regular season play was held from September 9, 2004, to January 2, 2005. Hurricanes forced the rescheduling of two Miami Dolphins home games: the game against the Tennessee Titans was moved up one day to Saturday, September 11 to avoid oncoming Hurricane Ivan, while the game versus the Pittsburgh Steelers on Sunday, September 26 was moved back 7½ hours to miss the eye of Hurricane Jeanne.
The playoffs began on January 8, and eventually the New England Patriots repeated as NFL champions when they defeated the Philadelphia Eagles in Super Bowl XXXIX at ALLTEL Stadium in Jacksonville, Florida on February 6. It would mark the last time a team won back-to-back Super Bowls until 2023 (that team being the Kansas City Chiefs).