2003 San Francisco 49ers season

The 2003San Francisco 49ersseason was the franchise's 57th season in the National Football League (NFL).

The team entered their 2003 season attempting to improve upon their 10–6 output from 2002. Dennis Erickson was the new head coach after Steve Mariucci was fired which resulted in a search that lasted four weeks. The 49ers failed to surpass their 2002 record and finished the season 7–9 by losing six close games, and the 49ers missed the playoffs for the first time since 2000.

It was the final season that noted 49ers Terrell Owens, Garrison Hearst, Tai Streets, Derrick Deese, Ron Stone, and Jeff Garcia spent with the team.