Sir William Glenholme Falconbridge, KC (May 12, 1846 – February 8, 1920) was a Canadian lawyer and judge in Ontario, Canada.

Born in Drummondville (now Niagara Falls, Ontario), Upper Canada, he was the son of John Kennedy Falconbridge, an Irish immigrant, and Sarah Fralick.

He served as the chair of modern languages at Yarmouth Seminary in Nova Scotia for his health and then returned to Toronto where he was a lecturer in Spanish and Italian at University College.

He was made a bencher of the Law Society of Upper Canada and created a Queen's Counsel in 1885.

In 1887, he was appointed a judge in the Queen's Bench division of Ontario's High Court of Justice.