William Whipple, Jr. (January 25, 1731 NS (January 14, 1730 OS – November 28, 1785) was a signatory of the United States Declaration of Independence as a representative of New Hampshire. Whipple was a member of the Continental congress from 1776 through 1779. Before becoming a politician, Whipple worked as both a ship's captain and a merchant. He was a prominent and wealthy member of society until he became a member of the new Hampshire Provincial congress. Whipple died of heart complications in 1785, aged 55.