Alf Binder was an Australian rugby league footballer who played in the 1920s and 1930s.
He played for South Sydney in the NSWRL competition during the club's first golden era.
Binder played in Souths 1928 grand final victory over arch rivals Eastern Suburbs which was played at the Royal Agricultural Society Grounds.
The victory was Souths 4th premiership in a row.
In 1929, Binder played 17 games for Souths including the 1929 grand final victory over Newtown which Souths comprehensively won 30–10 at the Sydney Sports Ground.