Mattituck is a hamlet and census-designated place (CDP) in Suffolk County, New York, United States.

[2] Located in the Town of Southold, Mattituck CDP roughly corresponds to the hamlet by the same name.

Sinai harbor) on the north side of Long Island on the Sound east of Port Jefferson.

Corchaug Indians, who were the first residents of the area, sold land to Theophilus Eaton, governor of New Haven, Connecticut.

Mattituck was occupied by British troops during the Revolutionary War and Governor Tryon visited.

Mattituck hosts an annual Strawberry Festival and is located in the heart of over 40 vineyards in the Long Island Wine Region.

[6] Mattituck-Cutchogue Union Free School District is attended by residents of Mattituck, Cutchogue and Laurel.