Jacob Bayley (July 19, 1726 – March 1, 1815) was an officer, first serving with the British in the French and Indian War, then later as a brigadier general in the Continental Army during the American Revolutionary War. After the French and Indian War, Bayley was one of the founders of Newbury, Vermont, and Haverhill, New Hampshire, He became wealthy from the proprietorship thereof, but during the Revolutionary War he paid for military expenses and soldiers' pay out of his own pocket, for which he was never compensated, and he died an impoverished man.