Brendan Williams (born 21 May 1978 in Urbenville) is a retired Australian-born rugby union player.

Signed to Randwick Rugby Club in 1998, a club he played for since 1995, he was awarded The Daily Telegraph Rookie of the Year award.

He was included in the Australian Commonwealth Games Rugby Sevens twice in consecutive games,[1] becoming a bronze medalist with his teammates.

He has also played as an international rugby player, notably playing for Petrarca Rugby based in Padova, Italy and Benetton Treviso, Italy[2] in the professional Italian rugby union as a wing (fullback).

Brendan retired from professional rugby playing his last game on 2 May 2014, at home against Glasgow Warriors losing the match 16-38.