Richard Duncan (died February 1819) was a soldier, judge and political figure in Upper Canada.
After the end of the Seven Years' War, he was involved in the fur trade in the Great Lakes area.
He fought with the King's Royal Regiment of New York during the American Revolution, being appointed Captain on June 19, 1776.
He commanded a company in the KRRNY during the Valley Campaigns in 1779 - 1781, including at the Battle of Klock's Field where he performed with "great gallantry and success".
Though he was granted large plots of land in Upper Canada as a Loyalist, including the land which would become the village of Chesterville, Duncan spent much of his time looking after his business interests in New York and was dropped from the Legislative Council for non-attendance in 1805.