Thomas William Wright Killiby (1898–1963) was an Australian WWI artilleryman and a first grade rugby league player who played in the 1920s and 1930s.

He was an artilleryman in a light trench mortar battery and embarked for the Western Front in Oct 1916 on HMAT Ceramic.

He kicked the only goal in St George's first recorded trial match against Glebe.A prop forward, Killiby played in the Saints' first finals appearance in 1927.

Upon his playing retirement Killiby stayed involved with the club as a trainer, masseur and gear steward.

He was a trainer for the Dragons' 1941 premiership winning side and also trained New South Wales representative teams during the 1940s and 1950s.