Preserves and exhibits the history of railroading, specializing in Long Island's significant contribution to railroad history.

Museum Complex contains several buildings displaying early American artifacts and activities, the Blacksmith Shop, Milk House, Boat House and others. Offers guided tours to schools and organizations. Museum Shop/Exchange Shop also on premises. Call for fees and to schedule a tour.

Preserves and exhibits local history and presents programs on local history of Southold.

Preserves and exhibits local history and presents programs on local history of Northport and surrounding areas.

Exhibits a 1858 one room schoolhouse which has been restored to its original working condition. Visitation by appointment only.

A museum, library and archives containing an extensive collection of historical and genealogical holdings on the people of Suffolk County. Offers school and public programs for adults and children. Reservations required.

Preserves and exhibits local history and presents programs on local history of Port Jefferson.

Keeps historical documents, articles and photographs of the Town.

Displays railroad memorabilia and artifacts including a telegraph system. Also has a caboose on display.

Preserves and exhibits local history and presents programs on local history of East Islip. Meetings are the first Wednesday of the month (except for January and February, July and August). Call for location and additional information.

Preserves and exhibits local history and presents programs on local history of Montauk. It is also responsible for the operation of both the Montauk Point Lighthouse Museum and Gift Shop and the Second House Museum as well as craft fairs and other public fund raising events.

Compiles detailed historical information regarding the town through research and interviews. Provides information to local media, organizations, institutions and residents on historical aspects of the town and its citizens.

Preserves and exhibits the history of Alexander Graham Bell and the development of the telephone. Exhibits include a re-creation of Alexander Graham Bell's workshop, the wire used in the first telephone transmission and models of early telephones.

Exhibits a 1858 one room schoolhouse which has been restored to its original working condition. Visitation by appointment only.

Preserves and exhibits local history and presents programs on local history of Hampton Bays.

Exhibits local history and presents programs on local history of Amagansett from the Colonial period through the 20th century. Consists of Miss Amelie Cottage Museum and the Roy K. Lester Carriage Museum exhibiting locally made 28 horse-drawn carriages. Call for schedule and fees.

Collects, catalogs, and preserves historical record of the unincorporated areas of the town, serves as chairman of the Town of Babylon Historic Preservation Commission, assists town employees and the general public in researching historical questions concerning the Town of Babylon.

Provides tours, and presentations about the history of Sayville, West Sayville, and immediately surrounding areas.

Preserves and exhibits local history and presents programs on local history of Farmingville. Call or e-mail for time and location of meeting.

Preserves and exhibits local history and presents programs on local history of Greenlawn and Centerport

Preserves and exhibits local history and presents programs on local history of Moriches Bay. Maintains the 1750 Havens Estate, including the Tuttle Barn which houses a museum and the thrift store, Haven's Gift Shop and Clothing Boutique. Meetings are held the 2nd Wednesday of each month. Call for more information.HAVEN'S GIFT SHOP AND CLOTHING BOUTIQUE CLOSED UNTIL FURTHER NOTICE.

Preserves and exhibits local history and presents programs on the local history of Lindenhurst. Tours are available. Call for additional information.

Preserves the history of the 14th Regiment New York State Militia and the American Civil War. Living history presentations are done at schools, historical societies, museums, parades and other events. Sets up a camp that resembles one from the Civil War, does drill and firing exhibitions and runs through a brief drill using wooden muskets. Restores grave sites of the Veterans of the 14th Regiment N.Y.S.M. All presentations are given in full civil war uniform.

Preserves and exhibits local history and presents programs on local history of North Great River. Call to set up appointments. The Society also prints a Quarterly Newsletter.

Responsible for designating historic districts and town landmarks.