Mattituck is a hamlet and census-designated place (CDP) within the Town of Southold in Suffolk County, New York. Mattituck is believed to have derived its name from the Algonquian name for “Great Creek”. Mattituck Creek has been dredged and is used extensively by pleasure craft on Long Island Sound (the Mattituck Inlet is the entrance into Mattituck Creek, and the whole waterway is now popularly referred to as Mattituck Inlet). It is only one of two harbors (the other being Mt. Sinai harbor) on the north side of Long Island on the Sound east of Port Jefferson.
Population: 4,219
Zip Code: 11952
Area Code: 631
Elevation: 13′
Mattituck Cutchogue Union Free School District
