William Bischoff Jr. (12 March 1938 – 6 June 2023) was an Australian professional rugby league footballer who played in the 1950s and 1960s.
In 1958, Bischoff played at five-eighth in the club's preliminary final loss scoring a try against St George.
At club level, Balmain reached the preliminary final against Western Suburbs but were defeated 8-5 with Bischoff playing at centre.
Bischoff played at halfback in the final as Balmain took a shock halftime lead over St George before Saints came back in the second half to win 11-6 at the Sydney Cricket Ground.
In 1966, Bischoff joined West Tamworth in the New South Wales country competition as captain-coach.