Billy Bainbridge (born 9 September 1997) is an Australian professional rugby league footballer who currently plays for the Manly Warringah Sea Eagles in the National Rugby League. He plays at second-row and lock.
Born in Cromer, New South Wales, Bainbridge played his junior rugby league for the Manly Christian Brothers, before being signed by the Manly Warringah Sea Eagles.
In 2015 and 2016, Bainbridge played for the Manly Warringah Sea Eagles' NYC team. In August 2015, he re-signed with the Sea Eagles on a 2-year contract until the end of 2017.
In round 26 of the 2016 NRL season, Bainbridge made his NRL debut for the Sea Eagles against the Penrith Panthers.