This article show all participating team squads at the 2015 FIVB Volleyball World League, played by thirty-two countries with the final round held in different countries.
The following is the Australian roster in the 2015 FIVB Volleyball World League.
Head coach: Roberto Santilli
The following is the Brazilian roster in the 2015 FIVB Volleyball World League.
Head coach: Bernardo Rezende
The following is the Italian roster in the 2015 FIVB Volleyball World League.
Head coach: Mauro Berruto
The following is the Serbian roster in the 2015 FIVB Volleyball World League.
Head coach: Nikola GrbiÃÂ
The following is the Iranian roster in the 2015 FIVB Volleyball World League.
Head coach: Slobodan KovaÃÂ
The following is the Polish roster in the 2015 FIVB Volleyball World League.
Head coach: Stephane Antiga
The following is the Russian roster in the 2015 FIVB Volleyball World League.
Head coach: Andrey Voronkov
The following is the United States roster in the 2015 FIVB Volleyball World League.
Head coach: John Speraw
The following is the Argentine roster in the 2015 FIVB Volleyball World League.
Head coach: Julio Velasco
The following is the Bulgarian roster in the 2015 FIVB Volleyball World League.
Head coach: Plamen Konstantinov
The following is the Canadian roster in the 2015 FIVB Volleyball World League.
Head coach: Glenn Hoag
The following is the Cuban roster in the 2015 FIVB Volleyball World League.
Head coach: Rodolfo Sánchez
The following is the Czech roster in the 2015 FIVB Volleyball World League.
Head coach: ZdenÃÂk à  mejkal
The following is the French roster in the 2015 FIVB Volleyball World League.
Head coach: Laurent Tillie
The following is the Japanese roster in the 2015 FIVB Volleyball World League.
Head coach: Masashi Nambu ||||align=left| Aichi Gakuin University |- |13||align=left|||align=right|||||||||||align=left| Panasonic Panthers |- |14||align=left|||align=right|||||||||||align=left| Sakai Blazers |- |15||align=left|||align=right|||||||||||align=left| Suntory Sunbirds |- |16||align=left|||align=right|||||||||||align=left| Sakai Blazers |- |17||align=left|||align=right|||||||||||align=left| Panasonic Panthers |- |18||align=left|||align=right|||||||||||align=left| Omonogawa High School |- |19||align=left|||align=right|||||||||||align=left| JTEKT Stings |- |20||align=left|||align=right|||||||||||align=left| Panasonic Panthers |- |21||align=left|||align=right|||||||||||align=left| JT Thunders |- |22||align=left|||align=right|||||||||||align=left| Sakai Blazers |- |23||align=left|||align=right|||||||||||align=left| Toray Arrows |- |24||align=left|||align=right|||||||||||align=left| Senshu University |- |25||align=left|||align=right|||||||||||align=left| University of Tsukuba
The following is the South Korean roster in the 2015 FIVB Volleyball World League.
Head Coach: Moon Yong-kwan
The following is the Belgian roster in the 2015 FIVB Volleyball World League.
Head Coach: Dominique Baeyens
The following is the Finnish roster in the 2015 FIVB Volleyball World League.
Head Coach: Tuomas Sammelvuo
The following is the Dutch roster in the 2015 FIVB Volleyball World League.
Head Coach: Gido Vermeulen
The following is the Portuguese roster in the 2015 FIVB Volleyball World League.
Head Coach: Hugo Silva
The following is the Montenegrin roster in the 2015 FIVB Volleyball World League.
The following is the Puerto Rican roster in the 2015 FIVB Volleyball World League.
The following is the Tunisian roster in the 2015 FIVB Volleyball World League.
The following is the Turkish roster in the 2015 FIVB Volleyball World League.
The following is the Chinese roster in the 2015 FIVB Volleyball World League.
The following is the Greek roster in the 2015 FIVB Volleyball World League.
The following is the Mexican roster in the 2015 FIVB Volleyball World League.
The following is the Slovakian roster in the 2015 FIVB Volleyball World League.
The following is the Egyptian roster in the 2015 FIVB Volleyball World League.
The following is the Kazakhstani roster in the 2015 FIVB Volleyball World League.
The following is the Spanish roster in the 2015 FIVB Volleyball World League.
The following is the Venezuelan roster in the 2015 FIVB Volleyball World League.