Below are the rosters for the 1981 FIFA World Youth Championship tournament in Australia. Those marked in bold went on to earn full international caps.
Group A
Head coach: Waldemar Obrebski
Head coach: Evaristo de Macedo
Head coach: Raúl Bentancor
Head coach: Walt Chyzowych
Group B
Head coach: Vavá
Head coach: Italo Acconcia
Head coach: Park Jong-Hwan
Head coach: Constantin Cernăianu
Group C
Head coach: Hany Moustafa
Head coach: Alfonso Portugal
Head coach: Chus Pereda
Head coach: Dietrich Weise
Group D
Head coach: Roberto Saporiti
Head coach: Les Scheinflug
Head coach: Radivoje Ognjanović
Head coach: John Cartwright
References
FIFA pages on 1981 World Youth Cup