The Henry Cabot Lodge House is a National Historic Landmark at 5 Cliff Street in Nahant, Massachusetts. It was designated as the only known residential building associated with United States Senator Henry Cabot Lodge (1850–1924). Lodge was a leading Republican politician who was a longtime associate of President Theodore Roosevelt, and an influential figure who led the successful opposition to the ratification of the Treaty of Versailles that ended World War I. The house was designated a National Historic Landmark and listed on the National Register of Historic Places in 1976.