Port Jefferson (Village & Harbor)

The Mather House Museum in Port Jefferson, New York is local history museum complex that includes:the mid 19th century period Mather House house with furnished rooms, and local history and decorative art exhibitsa craft house with a display of toys, spinning wheels and quiltsa country store with items from a historic barber shop, general store and butcher shopa barn with shipbuilding and sailmaking artifactsa tool shed with shipbuilding and carpentry toolsand a museum with antique clocks.

Bayles Shipyard is a historic shipyard located at Port Jefferson in Suffolk County, New York. It includes the 1897 Bayles Chandlery, the 1917 Machine Shop and Mould Loft and the 1917 Compressor House. The vicinity also contained a Mobil Oil Terminal.It was added to the National Register of Historic Places in 2000.

First National Bank of Port Jefferson is a historic bank building located at Port Jefferson in Suffolk County, New York. It is a ​2 1⁄2-story brick building with a 2-story turret that projects from the second story of the southwest corner and rises above the roofline. The turret has a steeply pitched, cone shaped slate roof and three windows on both levels.

Port Jefferson Village Historic District is a national historic district located at Port Jefferson in Suffolk County, New York. The district contains 98 contributing buildings. It includes a mix of residences, commercial buildings, and a church. The district is primarily residential dating from 1800 to 1915, with a majority built from the 1840s to 1870s in the Greek Revival and Italianate styles.