David Salisbury Franks (1740 in Philadelphia, Pennsylvania, USA – 1793, Philadelphia) was aide-de-camp for General Benedict Arnold during the American War of Independence.
He was living in Quebec with his parents when the American Revolution broke out. According to the late historian Jacob Rader Marcus, because Franks publicly defended the right of a protester to compare King George III of England to the Pope and call him a fool, Franks was jailed and held for 16 days. The experience converted him to the colonists' cause and, when an army led by Benedict Arnold and Richard Montgomery invaded Canada in 1775, Franks joined the American forces. He was appointed paymaster of the Continental Army in Quebec and apparently expended his own funds to pay the salaries of the American volunteers. Franks was promoted major and was assigned as Arnold's aide-de-camp.
On the failure of the American campaign in Canada, Franks withdrew in July 1776 to Philadelphia, where he joined the Continental Army and served until October 1777. Because he spoke French, Franks was then assigned as liaison officer to the Comte d'Estaing, commander of the French naval forces fighting on the American side.