Hewlett House is a historic home located at Cold Spring Harbor in Suffolk County, New York, United States.

It is a two-story, gable roofed dwelling built about 1815 and enlarged in the 1870s.

It features a one-story, shed roof front porch with a bracketed cornice and square columns.

[2] It was added to the National Register of Historic Places in 1985.

This article about a historic property or district in Suffolk County, New York, that is listed on the National Register of Historic Places, is a stub.