The following are the football (soccer) events of the year 2003 throughout the world.
- Confederations Cup: Host nation France wins a tournament marred by tragedy (see Deaths.)
- UEFA Champions League: AC Milan wins 3–2 on penalties over Juventus, after a 0–0 draw at Old Trafford. This was AC Milan's 6th European Cup.
- UEFA Cup: FC Porto wins 3–2 in the final against Celtic, after extra time, with a silver goal by Derlei. This is Porto's first UEFA Cup title.
- European Super Cup: AC Milan beats FC Porto 1–0, winning the cup for the 4th time.
- Copa Libertadores: Boca Juniors of Argentina won the cup for the fifth time against Santos of Brazil in a 5–1 aggregate.
- Recopa Sudamericana: Olimpia of Paraguay won 2–0 in the final against San Lorenzo of Argentina.
- FA Cup: Arsenal win 1–0 over Southampton
- FA Premier league – Manchester United wins the Premier League by 5 points over Arsenal.
- Women's World Cup: Germany wins the final against Sweden 2–1 after extra time.
- 22 January – Dutch club Sparta Rotterdam fires manager Dolf Roks, who is replaced on 7 February by former player Chris Dekker.
- 28 January – Head coach Robert Maaskant leaves Go Ahead Eagles and returns to RBC Roosendaal.
- 7 March – Mexican club Guadalajara appoints Hans Westerhof as their new technical director.
- 26 March – Manager Mike Snoei is fired by Dutch club Vitesse Arnhem to Ajax, and replaced by former player Edward Sturing.
- 17 June – Manchester United sells English football star David Beckham to Real Madrid for €35 million.
- 28 June – Italy's Piedmont wins the third UEFA Regions' Cup, beating France's Maine 2–1 in Heidenheim an der Brenz.
- 8 August – Satellite TV's Rupert Murdoch British Sky Broadcasting pay €510 million for transmission of FA Premier League seasons 2004–2007.
- 10 August – PSV wins the Johan Cruijff Schaal, the annual opening of the new season in the Eredivisie, by a 3–1 win over Utrecht in the Amsterdam ArenA.
- 25 September – Dutch club Zwolle sacks manager Peter Boeve.
- 1 October – Technical director Hans Westerhof is named head coach of Mexican club Guadalajara.
- 20 November – Manager Rinus Israël leaves ADO Den Haag and moves to Al Wahda in the United Arab Emirates. Lex Schoenmaker is his successor in The Hague.
- 28 November – In an Asian Cup qualifier between Iran and Lebanon, Ali Daei scores his 85th goal for the Iranian national team, breaking the record of Hungarian legend Ferenc Puskás.
- 14 December – Boca Juniors wins the Intercontinental Cup in Tokyo, Japan for the third time, by defeating Italy's AC Milan on penalties (3–1), after a 1–1 draw at the end of extra-time.
Winners national club championship
North and Central America
National team results
- 10 January – Julinho (73), Brazilian footballer