James W. and Anne Smith Phyfe Estate

Land of Clover, also known as the Lathrop Brown Estate, is a national historic district located at Nissequogue in Suffolk County, New York. The district encompasses an estate with six contributing buildings and one contributing structure. The estate house is a large two-story brick Georgian Revival structure built between 1912 and 1918. It is loosely patterned after Westover Plantation. Also on the property are a contributing horseshoe stable, superintendent's cottage, ice house and garage, U-shaped barn, small barn and a water tower. It is now a boarding school known as The Knox School. The Estate house is currently known as Houghton Hall. It was added to the National Register of Historic Places in 1993.

Beachbend, also known as the William H. Dixon Estate, is a national historic district located at Nissequogue in Suffolk County, New York. The district encompasses an estate with five contributing buildings and two contributing structures. The estate house is a large 18th-century house with alterations completed in 1924. It is a two-story, wood-frame, five-bay structure with a center hall plan. Also on the property are a contributing L-shaped barn, a cottage, a pump house. two sheds, and a well cover.It was added to the National Register of Historic Places in 1993.

Rassapeague, also known as the Francis C. Huntington and Susan Butler Huntington Estate, is a historic home located at Nissequogue in Suffolk County, New York. The estate house was built about 1865 and is a large Italianate house with additions completed in 1915. It is a two-story, wood frame, clapboarded dwelling with a large back service wing and porch. Also on the property are a "wine cellar," barn, and cottage.It was added to the National Register of Historic Places in 1993.On December 30, 2011, at approximately 5am, A fire broke out between the second floor and the attic. Firefighters battled the flames for almost ten hours, but were hampered with water supply issues stemming from the nearest fire hydrant being over 3000 ft away. Fire eventually engulfed the entire attic and most of the second floor causing major structural collapses. Due to the insatiability of the structure the building had to be razed.

William J. Ryan Estate, now Nissequogue Golf Club, is a national historic district located at Nissequogue in Suffolk County, New York. The district includes the principal dwelling, now the club house designed by Bradley Delehanty. The estate house was built in 1930 and is a two-story, brick structure with a five bay center block connected to perpendicular wings by hyphens. The entrance features a three bay projecting center section that rises to a pedimented roof gable; at the ridge is a circular attic window.It was added to the National Register of Historic Places in 1993.

Woodcrest, also known as the Homer Reboul Estate, is a national historic district located at Nissequogue in Suffolk County, New York. The district encompasses an estate with two contributing buildings and two contributing structure. The estate house is a large two story Shingle Style structure, with a gambrel roof and an attached service wing, built in 1895. It is surrounded by formal gardens. Also on the property are a contributing carriage house and pump house.It was added to the National Register of Historic Places in 1993.

Harbor House, also known as the George C. Case Estate, is a national historic district located at Nissequogue in Suffolk County, New York. The district encompasses an estate with two contributing buildings, one contributing site, and two contributing structures. The estate house is a two story with full attic structure with a gambrel roof designed in 1910. Also on the property are a contributing carriage barn / stable and a well house.It was added to the National Register of Historic Places in 1993.

Nissequogue () is a village in Suffolk County, on the North Shore of Long Island, in New York, United States. The village population was 1,564 at the 2020 census.The Incorporated Village of Nissequogue is located entirely within the Town of Smithtown.

By-the-Harbor, also known as the Prescott Hall Butler and Cornelia Smith Butler Estate, is a historic home located at Nissequogue in Suffolk County, New York. It was built about 1878 as the first of a group of country homes built on Stony Brook Harbor and one of Charles F. McKim's earliest projects. It is a long and narrow, two story, Shingle Style structure with a low attic level at each end. The south facade features a massive asymmetrical gable that rises from the first floor to the ridge of the roof. Also on the property are the original flanking stone entrance piers and rusted iron gates and casino building. The casino is a sprawling two story Colonial Revival style building with shingled facades and a hipped roof. The original section, holding a squash court and plunge baths, was designed in the 1890s by McKim, Mead, and White. In 1905, a wing containing a ballroom and designed by Stanford White, was added.It was added to the National Register of Historic Places in 1993.

Shore Cottage, also known as the Lawrence Grant White and Laura Chanler White Estate, is a national historic district located at Head of the Harbor in Suffolk County, New York. The district encompasses an estate with two contributing buildings. The estate house was designed in 1913 and is a 2+1⁄2-story, rectangular block clad in stucco under a gable slate roof. It was the summer home of the Lawrence Grant White family; he was a son of Stanford White. Also on the property is a contributing barn.It was added to the National Register of Historic Places in 1993.

Box Hill Estate is a national historic district located in St. James in Suffolk County, New York. The district encompasses an estate that includes five contributing buildings and one contributing structure. The estate house was the summer home of Stanford White. It was built in 1885 and is a rambling, multi-gabled structure surfaced in pebblestone dashed stucco. It features a one-story verandah defined by a range of fluted columns. Also on the property are a contributing cottage, barn, carriage house, stable, and water tower.It was added to the National Register of Historic Places in 1973.

Kate Annette Wetherill Estate is a national historic district located at Head of the Harbor in Suffolk County, New York. The district encompasses an estate with three contributing buildings, two contributing sites, and two contributing structures. The estate house was designed by Stanford White in 1895 in the Colonial Revival style The main block of the house is two stories with a full attic formed of facade gables corresponding to an octagonal form. A large 2+1⁄2-story, gable-roofed service wing projects to the east. Also on the property is a pump house, rose garden, stone entrance piers with iron gate, carriage barn, and superintendent's cottage.It was added to the National Register of Historic Places in 1993.

Head of the Harbor is a village in Suffolk County, on the North Shore of Long Island, New York, United States. The population was 1,472 at the time of the 2010 census.The Village of Head of the Harbor is located entirely within the Town of Smithtown.