The society's first premises was a house in North Parade, Penzance and in 1853 the Borough of Penzance put forward plans for a new public building on the west side of Penzance. It was planned to have the Borough offices, county court and police station in the east wing, the two floors of the west wing housing the RGSC's museum and a public hall between the two run by a public company. The building, known as St John's Hall, was opened in 1867 and still exists although, in July 2016, the west wing was occupied by the new Penzance library. In 2023 the RGSC's base was at King Edward Mine, near Camborne, although meetings and lectures were usually held at Camborne School of Mines and other facilities on the Penryn Campus, and via Zoom.
