2004–05 FC Lorient season

The 2004–05 FC Lorient season was the club's 79th season in existence and the third consecutive season in the second division of French football. In addition to the domestic league, Lorient participated in this season's edition of the Coupe de France and the Coupe de la Ligue. The season covered the period from 1 July 2004 to 30 June 2005.

Matches
The league fixtures were announced on 2 July 2004.