Union Oyster House

Union Oyster House
Pictured in 2025
Location41–43 Union Street,
Boston, Massachusetts
Coordinates42°21′41″N 71°3′25″W / 42.36139°N 71.05694°W / 42.36139; -71.05694
Builtc. 1716 (1716)
Architectural styleGeorgian
Part ofBlackstone Block Historic District (ID73000315)
NRHP reference No.03000645
Significant dates
Added to NRHPMay 27, 2003
Designated NHLMay 27, 2003
Designated CPMay 26, 1973

Union Oyster House is a restaurant at 41–43 Union Street in Downtown Boston, Massachusetts. Open to diners since 1826, it is among the oldest operating restaurants in the United States and the oldest known to have been continuously operating. The building, which is part of the Blackstone Block Historic District, was listed as a National Historic Landmark in 2003.