The 2004Miami Dolphins season was the team's 39th overall, and 35th as a member of the National Football League. The Dolphins were unable to improve upon their previous season's output of 10–6, instead only going 4–12 after starting the season 0–6. The team was adversely affected by the premature (drug-related) retirement of their star running back, Ricky Williams. With this season record below .500 the team would have their first losing season since 1988.
Their match with the Buffalo Bills in Week 6 is the only time in the NFL since 1968 that the last two winless teams have met each other.