David Davies (1818-1890) was a highly influential Welsh industrialist.

He is often known as David Davies Llandinam (from the place of his birth in Montgomeryshire), in order to differentiate him from others of the same name. During his lifetime, he was also known by the nicknames, "Top Sawyer" and "Davies the Ocean".

Davies was a coal magnate, largely responsible for the industrialisation of the Rhondda Valley. He founded the Parc and Maendy collieries, and constructed the docks at Barry. He served as Liberal MP for Cardigan from 1874 to 1886, and received a peerage. His grandson, another David Davies, continued his philanthropic activities. His two granddaughters, Gwendoline Davies and Margaret Davies, donated their substantial art collection to the National Museum of Wales.