For Pierrepont Manor, New York, see Jefferson County, New YorkPierrepont is a town and hamlet in St. Lawrence County, New York, in the United States. As of the 2010 census, the town population was 2,589. It was named after Hezekiah Pierrepont, the early owner of much of the town's territory. The Town of Pierrepont is centrally located in the county and is southeast of Canton. A hamlet of the same name is in the town of Pierrepont. Pierrepont Manor, however, is located in Jefferson County.