The Dyfed Archaeological Trust (Welsh: Ymddiriedolaeth Archaeolegol Dyfed) is one of the four Welsh Archaeological Trusts established in the mid-1970s with the charitable object 'to advance the education of the public in archaeology'.^[1] Its core area comprises Carmarthenshire, Ceredigion and Pembrokeshire (the old county of Dyfed) in south-west Wales.

Dyfed Archaeological Trust

Map of Wales showing the area covered by the Dyfed Archaeological Trust
Purpose	To advance the education of the public in archaeology
Trust Director	Ken Murphy
Website	www.dyfedarchaeology.org.uk

The Trust provides archaeological and related advice to central government, local planning authorities and other public and private organisations. It maintains the regional Historic Environment Record. The Welsh Archaeological Trusts were pioneers in developing Historic Environment Records (HERs) in the 1970s: Wales was the first part of the UK to develop a fully national system of what were then called ‘Sites and Monuments Records’; this fully computerised system was pioneered by the Dyfed Archaeological Trust Chief Executive, Don Benson.^[2]

Data included in the Historic Environment Record are publicly available on a dedicated website, Archwilio. The Trust also undertakes a wide range of field- and office-based projects, is a limited company and a registered charity.