Douglas Anthony Bassett (11 August 1927 – 8 November 2009) was a Welsh geologist and a director of the National Museum of Wales from 1977 to 1985.

Having joined the National Museum of Wales as keeper of Geology in 1959, he was appointed in the role of Director in 1977 until 1985, when ill-health forced him to retire.

He encouraged colleagues and students working in Wales to donate their specimen collections and developed the Museum as a centre for research, especially in the Natural Sciences.

In 1961, he published Bibliography and Index of Geology and Allied Sciences for Wales and the Welsh Borders 1897–1958, which made his name as a geologist, followed six years later by A Source-book of Geological, Geomorphological and Soil Maps for Wales and the Welsh Borders 1800–1966, which proved invaluable for town and country planners.

Various public bodies benefited from his expertise, amongst them the Welsh Office, the Ordnance Survey and the Nature Conservancy Council.