The 2002–03 season was the 118th season in the existence of FC Porto and the club's 88th consecutive season in the top flight of Portuguese football.

In addition to the domestic league, Porto participated in this season's editions of the Taça de Portugal and the UEFA Cup.

[1] 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: Competitions Source: Liga Portugal