The 2004–05 RCD Espanyol season was the club's 11th consecutive season in the top division of the Spanish football league, La Liga, and the 105th in the club's history.

Updated on 21 January 2024[2] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.

Source: [3] Source: [3]