David Gillies (June 27, 1849 – October 12, 1926) was a lumber merchant in Ontario and political figure in Quebec.

He was the son of John Gillies and Mary Cullen Bain, both Scottish immigrants.

With his brothers, he established a lumber company at Braeside, Ontario on the Ottawa River in 1873, serving as president from 1914 to 1926.

[1] Gillies Bros. & Co. Ltd. also manufactured steam engines, mill machinery, textiles and boats.

[2] The company did much of their logging in the Pontiac region and Gillies was elected to the Quebec assembly four times even though he was a resident of Ontario.