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.