The 2004 Portland Timbers season was the 4th season for the Portland Timbers—the 3rd incarnation of a club to bear the Timbers name—of the now-defunct A-League, the second-tier league of the United States and Canada at the time.

Conference Semifinal round of playoffs Source: [1] Pld = Matches played; Pts = Points; W = Matches won; T = Matches tied; L = Matches lost; GF = Goals for; GA = Goals against; GD = Goal difference

A-League Coach of the Year[5] A-League Co-Executive of the Year[6] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.

[22][23][24] Players with 1 card or more included only.