Historic Houses on Long Island

The grand stone façade and sweeping staircase of historic Mill Neck Manor in Mill Neck, New York. Originally built as Sefton Manor during Long Island's Gold Coast era, the estate later became home to the Mill Neck Manor School for the Deaf, preserving one of Nassau County's most distinguished historic mansions. — The grand stone façade and sweeping staircase of historic Mill Neck Manor in Mill Neck, New York. Originally built as Sefton Manor during Long Island’s Gold Coast era, the estate later became home to the Mill Neck Manor School for the Deaf, preserving one of Nassau County’s most distinguished historic mansions. File photo: Little Vignettes Photo, licensed.

Long Island contains an unusually broad collection of historic houses, preserved homesteads, country estates, colonial-era buildings, presidential residences, and Gilded Age mansions. The properties included in this directory span Nassau County and Suffolk County, documenting several centuries of architecture, agriculture, maritime life, political history, and estate culture.

Some properties operate as traditional house museums with guided tours and period rooms. Others form part of public parks, historical society campuses, cultural institutions, nature preserves, or larger estates with gardens and walking grounds. Public access, seasonal schedules, admission policies, and interior-tour availability vary by location.

Interactive Map of Historic Houses on Long Island

Use the interactive map to explore all 74 historic houses and estates included in this directory. Select a marker to view the property’s name, classification, community, address, official website when available, and driving directions. The map covers historic sites from western Nassau County to the North Fork, the Hamptons, and Montauk.

Historic Houses Across Long Island

The oldest surviving houses in the directory reflect Long Island’s colonial settlement and agricultural development. Preserved homes in communities such as Southampton, Southold, Cutchogue, Setauket, Smithtown, and Oyster Bay help document domestic life, farming, local government, trade, and community development from the seventeenth through nineteenth centuries.

The North Shore also contains many of Long Island’s best-known estate properties. During the late nineteenth and early twentieth centuries, industrialists, financiers, political leaders, and prominent families built large country homes throughout the area now associated with the Gold Coast. Preserved properties and estate grounds can be found in and around Glen Cove, Old Westbury, Centerport, Huntington, and the Oyster Bay region.

Colonial Homesteads, Mansions and House Museums

The properties in this directory represent several different kinds of historic resources. Colonial homesteads preserve early construction methods and household spaces. Historic house museums interpret the lives of former residents and the communities around them. Mansions and estates often combine architecture with landscaped grounds, gardens, outbuildings, art collections, or natural areas. Presidential and nationally significant properties connect Long Island with broader events in American history.

Not every property functions in the same way. Some are open regularly for tours, while others operate only during scheduled programs, seasonal weekends, exhibitions, or special events. Several are managed by local historical societies, municipalities, New York State, the National Park Service, nonprofit organizations, or private foundations.

Historic Houses on Long Island Directory

Historic House or Estate	Community	County	Type
Chelsea Mansion	East Norwich	Nassau	Historic Mansion
Sands-Willets House	Flower Hill	Nassau	Historic House Museum
The Homestead at Hofstra University	Hempstead	Nassau	Historic House / University Landmark
Rock Hall Museum	Lawrence	Nassau	Historic House Museum
Elderfields Preserve	Manhasset	Nassau	Historic House / Arts Center
Mill Neck Manor	Mill Neck	Nassau	Gold Coast Mansion
Denton House	New Hyde Park	Nassau	Preserved Historic House
Old Westbury Gardens	Old Westbury	Nassau	Gold Coast Mansion / Historic Estate
Earle-Wightman House	Oyster Bay	Nassau	Historic House Museum
Raynham Hall Museum	Oyster Bay	Nassau	Historic House Museum
Sagamore Hill National Historic Site	Oyster Bay	Nassau	Presidential Home / National Historic Site
Phillips House Museum	Rockville Centre	Nassau	Historic House Museum
Van Nostrand-Starkins House	Roslyn	Nassau	Historic House Museum
Cedarmere	Roslyn Harbor	Nassau	Historic Estate / Poet’s Home
Clayton (Nassau County Museum of Art)	Roslyn Harbor	Nassau	Gold Coast Mansion / Art Museum
Castle Gould	Sands Point	Nassau	Gold Coast Estate Building
Falaise	Sands Point	Nassau	Gold Coast Mansion / House Museum
Hempstead House	Sands Point	Nassau	Gold Coast Mansion
Coe Hall Historic House Museum	Upper Brookville	Nassau	Gold Coast Mansion / State Historic Park
Pagan-Fletcher Restoration	Valley Stream	Nassau	Historic House Museum
Miss Amelia Cottage Museum	Amagansett	Suffolk	Historic House Museum
Lauder Museum	Amityville	Suffolk	Historic House / Local History Museum
Nathaniel Conklin House	Babylon	Suffolk	Historic House Museum
Meadow Croft Estate	Bayport	Suffolk	Historic Estate / House Museum
Corwith House	Bridgehampton	Suffolk	Historic House Museum
Nathaniel Rogers House	Bridgehampton	Suffolk	Historic House Museum
Ketcham Inn	Center Moriches	Suffolk	Historic Inn / Museum
Suydam House	Centerport	Suffolk	Historic House Museum
Vanderbilt Mansion (Eagle’s Nest)	Centerport	Suffolk	Gold Coast Mansion / Museum
Marion Carll Farm	Commack	Suffolk	Historic Farmstead
The Old House	Cutchogue	Suffolk	Colonial Historic House Museum
East Hampton Historic Farm Museum	East Hampton	Suffolk	Historic Farmhouse Museum
Home Sweet Home Museum	East Hampton	Suffolk	Historic House Museum
Mulford Farm	East Hampton	Suffolk	Colonial Farmstead Museum
Osborn-Jackson House	East Hampton	Suffolk	Historic House Museum
Pollock-Krasner House and Study Center	East Hampton	Suffolk	Artist’s Home and Studio
Thomas & Mary Nimmo Moran Studio	East Hampton	Suffolk	Artist’s Home and Studio
Brewster House	East Setauket	Suffolk	Colonial Historic House Museum
Sherwood-Jayne House	East Setauket	Suffolk	Historic House Museum
Bayard Cutting Manor House	Great River	Suffolk	Historic Estate / State Park
Southside Sportsmen’s Club Lodge	Great River	Suffolk	Historic Lodge / State Historic Site
Margaret E. Ireland House	Greenport	Suffolk	Historic House / Local History Museum
Coindre Hall	Huntington	Suffolk	Gold Coast Mansion / Public Estate
Conklin House	Huntington	Suffolk	Historic House Museum
Kissam House Museum	Huntington	Suffolk	Historic House Museum
Oheka Castle	Huntington	Suffolk	Gold Coast Mansion / Hotel
Walt Whitman Birthplace State Historic Site	Huntington Station	Suffolk	Writer’s Birthplace / Historic House Museum
Scully Estate	Islip	Suffolk	Historic Estate / Arboretum
Joseph Lloyd Manor	Lloyd Harbor	Suffolk	Colonial Manor House Museum
William Floyd Estate	Mastic Beach	Suffolk	National Historic Site / Ancestral Home
Second House Museum	Montauk	Suffolk	Historic House Museum
Hallock Homestead	Orient	Suffolk	Historic Homestead Museum
Webb House	Orient	Suffolk	Historic House Museum
Mather House Museum	Port Jefferson	Suffolk	Historic House Museum
Longwood Estate	Ridge	Suffolk	Historic Estate / House Museum
Fitz-Greene Hallock Homestead	Riverhead	Suffolk	Historic Homestead Museum
Hallockville Museum Farm	Riverhead	Suffolk	Historic Farmstead Museum
Annie Cooper Boyd House	Sag Harbor	Suffolk	Historic House Museum
Custom House	Sag Harbor	Suffolk	Historic House Museum
Edwards Homestead	Sayville	Suffolk	Historic Homestead Museum
Thompson House	Setauket	Suffolk	Colonial Historic House Museum
Havens House	Shelter Island	Suffolk	Historic Homestead Museum
Sylvester Manor	Shelter Island	Suffolk	Historic Manor / Educational Farm
Taylor’s Island House	Shelter Island	Suffolk	Historic House / Public Preserve
Manor of St. George	Shirley	Suffolk	Colonial Manor House Museum
Blydenburgh-Weld House	Smithtown	Suffolk	Historic House / County Park
Caleb Smith House	Smithtown	Suffolk	Historic House Museum
Judge John Lawrence Smith Homestead	Smithtown	Suffolk	Historic Homestead
Obadiah Smith House	Smithtown	Suffolk	Historic House
Rogers Mansion	Southampton	Suffolk	Historic Mansion / Museum Complex
Thomas Halsey Homestead	Southampton	Suffolk	Colonial Homestead Museum
Ann Currie-Bell House	Southold	Suffolk	Historic House Museum
Thomas Moore House	Southold	Suffolk	Historic House Museum
Sagtikos Manor	West Bay Shore	Suffolk	Historic Manor House Museum

Planning a Visit

Visitors should review each property’s official website before traveling. Tour schedules, admission fees, parking arrangements, photography rules, accessibility, and access to interior rooms may differ significantly. Some sites require advance reservations, while others allow visitors to explore only the grounds unless a guided tour or public program is scheduled.

Several locations are concentrated in the same parts of Long Island, making regional day trips practical. The Oyster Bay and Gold Coast areas contain presidential, estate, and mansion properties. The Huntington and Smithtown region includes historic homesteads and museums. The North Fork contains early farmhouses, historical society properties, and preserved village buildings, while the Hamptons include colonial houses, artists’ homes, and local-history museums.

Preservation and Public Access

Long Island’s historic houses survive because of preservation work by government agencies, historical societies, foundations, museums, volunteers, property owners, and local communities. Preservation may include architectural restoration, archival research, collections management, archaeological study, landscape maintenance, and public education. In many cases, the house is only one part of a larger historic site that may also contain barns, gardens, cemeteries, workshops, tenant buildings, or other structures.

A listing in this directory does not necessarily mean that the building is open every day or that the interior is accessible. Some locations remain active institutional properties or have limited public hours. The map and directory are intended to help readers identify the site, find its official information, and determine whether tours or public programs are currently available.

Methodology

This directory was compiled from official museum and historic-site websites, municipal and county resources, historical society information, New York State resources, National Park Service information, preservation organizations, and published institutional records. Each entry was reviewed as a historic house, homestead, mansion, estate residence, artist’s home, presidential home, or related house museum located in Nassau or Suffolk County.

Every address was reviewed and geocoded before being added to the production map. The directory is not a ranking and does not evaluate historical importance, architecture, tour quality, preservation condition, or visitor experience. Ownership, names, websites, public access, operating seasons, and tour schedules can change. Readers should confirm current information directly with the organization responsible for each property before visiting.

Historic houses across Long Island preserve the region’s development from early colonial settlements and farming communities to the Gold Coast era and modern historic preservation movement. The interactive map and directory provide a practical starting point for locating these properties, comparing their historical roles, and visiting official websites for current tours, programs, and access information.