William Caldwell McClelland CBE (9 February 1875 – 30 May 1957) was a medical doctor and an Australian rules football player and administrator.

Born at Buninyong, on Victoria's goldfields, to an Irish-born father (David) and his Victorian-born wife (Mary), McClelland went to Brighton Grammar School and then to the University of Melbourne where he was resident at Ormond College.

He joined the Melbourne Football Club in 1894, but due to injury and medical studies, could not hold a place in the lineup until 1898, and became known as an often brilliant centre half-back.

He was appointed a Commander of the Order of the British Empire (CBE) for services to sport in Australia in the 1955 Birthday Honours.

After the AFL announced the Under-19s competition would be shut down at the end of the 1991 season, to be replaced with a new Under-18s competition (the TAC Cup) featuring teams that were unaffiliated with the AFL clubs, the criteria for the McClelland Trophy was changed: from 1991 to 2022, it was awarded to the team finishing first on the ladder at the end of the home-and-away season, thus merging the Trophy with the minor premiership.