|Duration||September 4 – December 28, 2003|
|Start date||January 3, 2004|
|AFC Champions||New England Patriots|
|NFC Champions||Carolina Panthers|
|Super Bowl XXXVIII|
|Date||February 1, 2004|
|Site||Reliant Stadium, Houston, Texas|
|Champions||New England Patriots|
|Date||February 8, 2004|
Regular-season play was held from September 4, 2003, to December 28, 2003. Due to damage caused by the Cedar Fire, Qualcomm Stadium was used as an emergency shelter, and thus the Miami Dolphins–San Diego Chargers regular-season match on October 27 was instead played at Sun Devil Stadium, the home field of the Arizona Cardinals. This was the first season in NFL History where every team won at least 4 games.
The playoffs began on January 3, 2004. The NFL title was won by the New England Patriots when they defeated the Carolina Panthers, 32–29, in Super Bowl XXXVIII at Reliant Stadium in Houston, Texas, on February 1.
This was the last season until the 2016 NFL season where neither of the previous Super Bowl participants made the playoffs.