The 9th World Championships in Athletics, under the auspices of the International Association of Athletics Federations, were held from 23 August to 31 August 2003 in the streets of Paris and the Stade de France in Saint-Denis, Seine-Saint-Denis, France.

1 Jerome Young of the United States originally finished first in 44.50, but was disqualified after he tested positive for drugs in 2004.

2 The United States (Calvin Harrison, Tyree Washington, Derrick Brew, Jerome Young) originally finished first in 2:58.88, but were disqualified after Jerome Young and Calvin Harrison both tested positive for drugs in 2004.

1999 | 2001 | 2003 | 2005 | 2007 1999 | 2001 | 2003 | 2005 | 2007 Note: * Indicates medalists who ran in preliminary rounds.

1999 | 2001 | 2003 | 2005 | 2007 *   Host nation (France)For more information about these results including in-depth results of all heats and finals that include photo finish, wind readings and reaction times see the link below.