Eatons Neck is a hamlet and census-designated place (CDP) in the Town of Huntington in Suffolk County, on the North Shore of Long Island, in New York, United States.

[2] There is a United States Coast Guard station at the northern tip of the hamlet.

In 1927, the bulk of Eatons Neck consisting of what is today known as the Morgan Estate and Two-Acre Zone was subdivided and sold by the heirs of Cornelius H. DeLamater.

The Eaton Harbors Corporation was created to hold title to, and maintain, all the private beaches and roads on the former estate.

[3] According to the United States Census Bureau, the CDP has a total area of 1.0 square mile (2.6 km2), all land.

Eatons Neck is located entirely within the boundaries of (and is thus served by) the Northport-East Northport Union Free School District.