Sir John Johnson, 2nd Baronet of New York (5 November 1741 – 4 January 1830) was a Loyalist leader during the American Revolution, British Loyalist/provincial milita officer, a politician in Canada and a wealthy landowner. He was the son of Sir William Johnson, 1st Baronet, who was the British Superintendent of Indian Affairs for the northern colonies, based in New York province.
He inherited his father's baronetcy and lands in 1774. Sir John removed to Canada during the American Revolutionary War with family and allies, as he was at risk of arrest by rebel authorities. He led the King's Royal Regiment of New York and was promoted to brigadier general in 1782. That year Sir John Johnson was also appointed as Superintendent General and Inspector General of Indian affairs of First Nations in Canada, including the four Iroquois nations that had relocated there. After the war, he was appointed by the Crown to distribute lands in Upper Canada to exiled Loyalists, and estimated he helped resettle nearly 3800 in 1784. He also served in the Legislative Council of Lower Canada.
Born near Amsterdam, New York, Johnson was the only son of the Superintendent of Indian Affairs, Colonel Sir William Johnson, 1st Baronet, and his common-law wife, Catherine Weisenberg, a Palatine German immigrant. He was baptized as an Anglican in the chapel at Fort Hunter. William Johnson was a military commander during the French and Indian War (Seven Years' War), had promoted the British settlement of the Mohawk Valley and trading with the Mohawk, and founded the community of Johnstown in Tryon County in the Province of New York.