2002 FIFA World Cup squads

The 2002 FIFA World Cup was the 17th edition of the FIFA World Cup, an international association football competition that serves as the championship for men's national teams. It was held in Japan and South Korea from 31 May to 30 June and was contested by 32 teams. Each national association was required to name a provisional squad of 23 players, expanded from 22 in previous tournaments, by 21 May 2002.
The players' ages, caps and clubs are listed as of 31 May 2002, the opening day of the tournament. The oldest player was defender Jan Heintze of Denmark at 38 years, 293 days old; the youngest was Femi Opabunmi, a 17-year-old midfielder for Nigeria.

Group A

Denmark

Head coach: Morten Olsen

France

Head coach: Roger Lemerre

Senegal

Head coach: Bruno Metsu

Uruguay

Head coach: Víctor Púa

Group B

Paraguay

Head coach: Cesare Maldini

Slovenia

Head coach: Srečko Katanec
Note: caps for Yugoslavia are not counted.

South Africa

Head coach: Jomo Sono

Spain

Head coach: José Antonio Camacho

Group C

Group D

Poland

Head coach: Jerzy Engel

Portugal

Head coach: António Oliveira

South Korea

Head coach: Guus Hiddink

United States

Head coach: Bruce Arena

Group E

Cameroon

Head coach: Winfried Schäfer

Germany

Head coach: Rudi Völler

Republic of Ireland

Head coach: Mick McCarthy

Roy Keane left the squad before the tournament and was not replaced. Keane was technically still part of the named squad and appeared in FIFA's official squad lists.

Saudi Arabia

Head coach: Nasser Al-Johar

Group F

Argentina

Head coach: Marcelo Bielsa
Originally, the squad was named with Ariel Ortega given shirt number 23 and Roberto Bonano number 24, as the Argentine Football Association had decided to retire the number 10 shirt in honour of Diego Maradona. FIFA, however, insisted that all squads were assigned with numbers ranging only from 1–23, prompting Argentina to amend their squad list.

England

Head coach: Sven-Göran Eriksson

Nigeria

Head coach: Festus Onigbinde

Sweden

Head coaches: Lars Lagerbäck and Tommy Söderberg

Group G

Croatia

Head coach: Mirko Jozić
Note: caps for Yugoslavia are not counted.

Ecuador

Head coach: Hernán Darío Gómez

Italy

Head coach: Giovanni Trapattoni

Mexico

Head coach: Javier Aguirre

Group H

Belgium

Head coach: Robert Waseige

Japan

Head coach: Philippe Troussier

Russia

Head coach: Oleg Romantsev
Note: caps include those for USSR, CIS, and Russia, while those for other countries, such as Ukraine, are not counted.

Tunisia

Head coach: Ammar Souayah

Player representation by league

The Saudi Arabian squad was the only one made up entirely of players from their country's domestic league and the only one with no players from European clubs. The Cameroonian squad were made up entirely of players employed by overseas clubs, while the Irish squad was made up entirely by players in the English league. Although the Netherlands and Greece failed to qualify for the finals, their domestic leagues were represented by 18 and 10 players respectively. Altogether, there were 43 national leagues who had players in the tournament.