William Loney (31 May 1879 – 6 March 1956) was a Scottish footballer who played for Celtic, Partick Thistle, Motherwell and Scotland. He had a key role in the Celtic team of the 1900s which won six consecutive Scottish Football League championships. His brother (Clyde, Dundee Hibernian) and cousin Harry (Falkirk, Alloa Athletic, Dumbarton) were also footballers.