The following is a list of squads for each nation competing in men's football at the 2004 Summer Olympics in Athens. Each nation must submit a squad of 18 players, 15 of whom must be born on or after 1 January 1981, and three of whom can be older dispensation players.
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Greece
The following is the Greek squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Stratos Apostolakis
* Over-aged player.
Mali
The following is the Malian squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Cheick Oumar Kone
* Over-aged player.
Mexico
The following is the Mexican squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Ricardo La Volpe
* Over-aged player.
South Korea
The following is the South Korean squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Kim Ho-kon
* Over-aged player.
Ghana
The following is the Ghanaian squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Mariano Barreto
* Over-aged player.
Italy
The following is the Italian squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Claudio Gentile
* Over-aged player.
Japan
The following is the Japanese squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Masakuni Yamamoto
* Over-aged player.
Paraguay
The following is the Paraguayan squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Carlos Jara Saguier
* Over-aged player.
Argentina
The following is the Argentine squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Marcelo Bielsa
* Over-aged player.
Australia
The following is the Australian squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Frank Farina
* Over-aged player.
Serbia and Montenegro
The following is the Serbia and Montenegrin squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Vladimir Petrović
* Over-aged player.
Tunisia
The following is the Tunisian squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Khemais Labidi
* Over-aged player.
Costa Rica
The following is the Costa Rican squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Rodrigo Kenton
* Over-aged player.
Iraq
The following is the Iraqi squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Adnan Hamad
* Over-aged player.
Morocco
The following is the Moroccan squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: Mustapha Madih
* Over-aged player.
Portugal
The following is the Portuguese squad in the men's football tournament of the 2004 Summer Olympics. ‹See Tfd›
Head coach: José Romão
* Over-aged player.