William Freeborn (1594–1670) was one of the founding settlers of Portsmouth on Aquidneck Island (Rhode Island), having signed the Portsmouth Compact with 22 other men while still living in Boston. Coming from Maldon in Essex, England, he sailed to New England in 1634 with his wife and two young daughters, settling in Roxbury in the Massachusetts Bay Colony. He soon moved to Boston where he became interested in the preachings of the dissident ministers John Wheelwright and Anne Hutchinson, and following their banishment from the colony during the Antinomian Controversy, he joined many of their other followers in Portsmouth.