William Copeland Ferguson (13 February 1901 – 31 August 1960) was a Scottish footballer and manager best known for his time at Chelsea and Dumfries side Queen of the South. His position was usually as a left winger.

Ferguson was born in Muirkirk, Ayrshire to Daniel Ferguson, a coal miner, and Barbara, née Brown. He was still a child when his family moved to Kirkconnel, where he started in football with local junior side Kello Rovers.

Willie Ferguson first joined fledgling Queen of the South in nearby Dumfries during season 1921–22, their third season after formation. Ferguson was the fourth of the players at the club in its first three seasons who would go on build successful careers in England's top division. The others were Dave Halliday, Ian Dickson and Hughie Gallacher. Ferguson failed to complete the season at Queens as his talents attracted big name attention.

Ferguson signed for London club Chelsea. Between then and his departure in 1933 he made 294 first team appearances scoring 11 goals.

The club were relegated in 1923–24 and in four of the next five seasons were to narrowly miss out on promotion, finishing 5th, 3rd, 4th and 3rd. They finally reached the First Division again in 1929–30, where they were to remain for the next 32 years.

To capitalise on the 1930 promotion, Chelsea spent £25,000 ($49,000) on three big-name players; Scots Hughie Gallacher, Alex Jackson and Alec Cheyne. Though the team sometimes clicked, trophies remained elusive through the decade. Some felt money was too often spent on inappropriate players, especially forwards, while the defence remained neglected.

The FA Cup was to be the closest the club came to silverware. In 1932, the team secured impressive wins over Liverpool and Sheffield Wednesday, but lost out to Newcastle United in the semi-finals.

Ferguson returned to Scotland mid season and played 17 games in the second part of 1932–33 with St Bernard's F.C.