First National Bank of Port Jefferson

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.It was added to the National Register of Historic Places in 2005.

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 exhibits a craft house with a display of toys, spinning wheels and quilts a country store with items from a historic barber shop, general store and butcher shop a barn with shipbuilding and sailmaking artifacts a tool shed with shipbuilding and carpentry tools and a museum with antique clocks.The house is the headquarters location for The Historical Society of Greater Port Jefferson. The house is located at 115 Prospect Street in Port Jefferson.

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. The machine shop and mould loft is currently used as the Port Jefferson Village Center. The former Mobil Oil terminal was converted into the Jeanne Garant Harborfront Park in 2004.

Earl L. Vandermeulen High School, also referred to as Port Jefferson High School, is in the Port Jefferson School District, located in Port Jefferson, New York.

Port Jefferson, also known as Port Jeff, is an incorporated village in the town of Brookhaven in Suffolk County, New York, on the North Shore of Long Island. Officially known as the Incorporated Village of Port Jefferson, the population was 7,962 as of the 2020 United States census.Port Jefferson was first settled in the 17th century and remained a rural community until its development as an active shipbuilding center in the mid-19th century. The village has since transitioned to a tourist-based economy. The port remains active as terminus of the Bridgeport & Port Jefferson Ferry, one of two commercial ferry lines between Long Island and Connecticut, and is supplemented by the terminus of the Long Island Rail Road's Port Jefferson Branch. It is also the center of the Greater Port Jefferson region of northwestern Brookhaven, serving as the cultural, commercial and transportation hub of the neighboring Port Jefferson Station, Belle Terre, Mount Sinai, Miller Place, Poquott, and the Setaukets.

Port Jefferson Power Station is a fossil-burning power plant in Port Jefferson, New York on Long Island. It is operated by National Grid USA. Its four main steam turbine units were constructed between 1948 and 1960 by the Long Island Lighting Company (LILCO), with the older two decommissioned in 1994.

Lawrence Aviation Industries, Inc. (Lawrence Aviation) was an aircraft parts manufacturer that made titanium parts for military aircraft, such as the Grumman F-14 fighter jet. The former owner of the company, Gerald Cohen, was sentenced to one year and a day in prison and ordered to pay $105,816 in restitution for illegally storing more than 12 tons of hazardous waste on the company's grounds. The former site of the company, in the hamlet of Port Jefferson Station, Town of Brookhaven, New York, is one of the most contaminated sites on Long Island and may be responsible for a toxic groundwater plume in the region. The site is bounded by the Long Island Railroad tracks and Sheep Pasture Road to the north. A Long Island Power Authority easement runs along the southern edge of the property, separating the site from a residential area. To the east and west are residential areas.

Belle Terre is a village in the Town of Brookhaven in Suffolk County, on the North Shore of Long Island, in New York, United States. The population was 792 at the 2010 census.

Mather Hospital (formerly known as John T. Mather Memorial Hospital) is a general teaching hospital operated by Northwell Health, located in Port Jefferson, New York. It is named after John T. Mather (1854-1928), who, in 1916, made provisions to his will to create the hospital.

Poquott is a village in Suffolk County, New York, United States. The population was 953 at the 2010 census. The village is located in the Town of Brookhaven, on the North Shore of Long Island, and is officially known as the Incorporated Village of Poquott.

Port Jefferson is the terminus for the Port Jefferson Branch of the Long Island Rail Road in Port Jefferson Station, New York. The station is located on New York State Route 25A (Main Street), on the north side of the tracks, but is also accessible from Oakland Avenue, as well as Railroad Avenue and Union Street on the south side of the tracks. All service is diesel-only, and most off-peak trains are shuttles requiring a transfer to an electric train at Huntington. The station also serves Suffolk County Transit buses and occasionally the Village of Port Jefferson's own local jitney buses. One Suffolk County Transit bus, (Route S51) leads to the Bridgeport & Port Jefferson Ferry, approximately one mile to the north. It features service to Bridgeport, Connecticut, hence the reason for some station name signs being adjacent to "Bridgeport Ferries" signs.

Sherwood-Jayne House is a historic home and related buildings located at East Setauket in Suffolk County, New York. The property encompasses a two-story dwelling, as well as five accessory buildings, mature planting, split-rail and picket fences, and other landscape features. The construction dates of the house spans from about 1730 to 1940. It is a two-story, six-bay saltbox form dwelling with a two-story rear extension that forms an L-shaped plan. The five accessory structures are a large bar, carriage house, corn crib, prive, and pump house.A north addition to the house was designed by architect Arthur C. Nash.: 28 It was added to the National Register of Historic Places in 2009.The house is now owned by the Society for the Preservation of Long Island Antiquities. It has been furnished with period antiques and is open for visits seasonally by appointment.