The following is the list of squads that took part in the men's water polo tournament at the 1952 Summer Olympics.

Argentina

Argentina entered a squad of ten players. They scored six goals but only three scorers are known. Head coach:

Australia

Australia entered a squad of ten players. They scored two goals but all scorers are unknown. Head coach:

Austria

Austria entered a squad of eleven players. They scored fourteen goals but all scorers are unknown. Head coach:

Belgium

Belgium entered an unknown number of players ten of them are known. They scored 27 goals but only two scorers are known. Head coach:

Brazil

The following players represented Brazil.

Egypt

The following players represented Egypt.

Germany

The following players represented Germany.

Great Britain

The following players represented Great Britain.

Hungary

Hungary entered a squad of 13 players. They scored 53 goals. Head coach:

India

The following players represented India.

Italy

Italy entered a squad of eleven players. They scored 43 goals but all scorers are unknown. Head coach: Giulio De Filippis and Mario Majoni

Mexico

The following players represented Mexico.

Netherlands

The Netherlands entered an unknown number of players only seven of them are known. They scored 43 goals only 38 scorers are unknown. Head coach: Frans Kuyper

Portugal

Portugal entered a squad of ten players. They scored two goals but both are unknown. Head coach:

Romania

The following players represented Romania.

South Africa

The following players represented South Africa.

Soviet Union

The Soviet Union entered a squad of 13 players. They scored 38 goals but only four scorers are known. Head coach: Vadim Kuznetsov and Ivan Dmitriev

Spain

The following players represented Spain.

Sweden

The following players represented Sweden.

United States

The United States entered a squad of eleven players. They scored 35 goals but only 19 scorers are known. Head coach: Urho Saari (coach); John Curran (manager)

Yugoslavia

Yugoslavia entered a squad of eleven players. They scored 44 goals but only four scorers are known. Head coach: