Lieutenant-General Sir Richard Downes Jackson KCB (1777 – 9 June 1845), born at Petersfield in the English county of Hampshire, was an officer in the British Army and subsequently colonial Administrator. Following service during the Napoleonic Wars, he was appointed the Commander-in-Chief of the British Army in British North America. During that time, he also served for a few months as the Administrator of the government of the Province of Canada. He died in Canada in 1845 and is buried there.