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Riverhead is a town within Suffolk County, New York, United States, on the north shore of Long Island. Since 1727, Riverhead has been the county seat of Suffolk County, though most county offices are in Hauppauge. As of the 2020 census, the population was 35,902. The town rests on the mouth of the Peconic River, from which it derives its name. The smaller hamlet of Riverhead lies within it, and is the town’s principal economic center. The town is 166 miles (267 km) southwest of Boston via the Orient Point-New London Ferry, and is 76 miles (123 km) northeast of New York City.
European colonists purchased the “Southold land” from the local Algonquian-speaking Native Americans and Shinnecock Indian Nation in 1649. An additional portion was purchased from Col. William Smith and divided among settlers in 1742.
The town of Riverhead was created in 1792 as part of new jurisdictions after the American Revolution. The New York State Legislature divided it from the town of Southold, New York, which lies to the north and east. Riverhead was separated at the behest of its inhabitants, who “represented to the Legislature that their town is so long that it is very inconvenient for them [people of western regions of Southold] to attend at [sic] town meetings, and also to transact the other necessary business of the said town, and have prayed that the same may be divided into two towns”. The poor western sections of Southold, with no harbor and little commerce, were thus divided. On March 13, 1792, the Legislature passed a bill splitting off this section under the name River Head. The new enclave’s first town meeting was scheduled to be held April 3, 1792.
River Head was named the county seat of Suffolk County (called a “county town” at the time), and its name was later combined as Riverhead.
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