The Gwalia Gold Mine is located at Gwalia, a few kilometres south of Leonora, Western Australia. It was originally established by Welsh miners in the late 19th century and Herbert Hoover, the later President of the United States, served as the mine manager in its early days from May to November 1898. It is operated by St Barbara Limited. Apart from Gwalia, St Barbara also operates the Marvel Loch Gold Mine at Marvel Loch and owns the Tarmoola Gold Mine, which is placed in care and maintenance.