| Club: | 1. FSV Mainz 05 |
| Season: | 2004–05 |
| Manager: | Jürgen Klopp |
| Stadium: | Bruchwegstadion |
| League: | Bundesliga |
| League Result: | 11th |
| Cup1: | DFB-Pokal |
| Cup1 Result: | Second round |
| Prevseason: | 2003–04 |
| Nextseason: | 2005–06 |
During the 2004–05 German football season, 1. FSV Mainz 05 competed in the Bundesliga.
A solid first-ever season in Germany's top flight saw Mainz comfortably qualify for the next season's Bundesliga with an 11th-placed finish. Furthermore, the team were awarded Germany's fair play award - because Germany were awarded an extra spot in the UEFA Cup through the Fair Play draw, Mainz qualified for the UEFA Cup's first round.
Squad at end of season[1]