Newton is located near the headwaters of the east branch of the Paulins Kill, a tributary of the Delaware River. In October 1715, Colonial surveyor Samuel Green plotted a tract of at the head of the Paulins Kill, then known as the "Tohokenetcunck River", on behalf of William Penn. This tract, which would not be settled for approximately 30–35 years, was part of the survey and division of the last acquisition of Native American land by the West Jersey Board of Proprietors. At the time of Green's survey, northwestern New Jersey was populated with bands of the Munsee, the northern branch of the Lenape Native Americans.