The 2004 AF2 season was the fifth season of the AF2. It was preceded by 2003 and succeeded by 2005. The league champions were the Florida Firecats, who defeated the Peoria Pirates in ArenaCup V.
ArenaCup V was the 2004 edition of the AF2's championship game, in which the National Conference Champions Florida Firecats defeated the American Conference Champions Peoria Pirates in Estero, Florida by a score of 39 to 26 .