William John Brockway (8 October 1928 – 26 July 2009) was a male Welsh competitive swimmer.

Brockway represented Great Britain at the Olympics and European championships, and Wales at the British Empire Games, during the late 1940s and 1950s.

Competing for Wales at the 1950 British Empire Games in Auckland, New Zealand, he won the silver medal in the men's 110-yard backstroke in 1:08.0.

He then went on to win the gold medal in the same event at the 1954 British Empire and Commonwealth Games in Vancouver, Canada, swimming a time of 1:06.5.

[4][5][6][7][8][9] Following his swimming career, Brockway became an engineer at steelworks in the Newport area of South Wales.