John Kirby (1772 – December 19, 1846) was a businessman and political figure in Upper Canada.
He was born in Knaresborough, England in 1772 and arrived in the Fort Ticonderoga area of New York with his parents in 1774.
His father moved to St. Johns (now Saint-Jean-sur-Richelieu) in Lower Canada after the American Revolution.
He owned shares in steamships on Lake Ontario and helped found and was later president of the Cataraqui Bridge Company.
He served on the Legislative Council of Upper Canada from 1831 to 1841 and was a lieutenant-colonel in the local militia.