Hercules Mulligan (September 25, 1740 – March 4, 1825) was a tailor and spy during the American Revolutionary War. Born in Ireland to Hugh and Sarah Mulligan, the family immigrated to North America in 1746, settling in New York City. Mulligan attended King's College (now Columbia University) in New York City. After graduating, Mulligan worked as a clerk for his father's accounting business. He later went on to open a tailoring and haberdashery business, catering to wealthy British Crown force officers.