During the 2004–05 German football season, Alemannia Aachen competed in the 2.

Alemannia Aachen failed to gain promotion to the Bundesliga or even repeat their cup run of the previous season, but still enjoyed a decent run in the UEFA Cup, making it through the group stages before being knocked out in the round of 32 by eventual semi-finalists AZ.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.