DOLGELLY, a market and county town of Merionethshire, Wales, situated on the streams Wnion and Aran, at the north base of Cador Idris, on the G.W. railway. Pop. of urban district (1931) , 2,261. It consists of small squares and narrow streets, with a grammar school (1665), market hall and assize hall. There is a little manufacture of flannel and coarse woollens. An ancient house has associations with Owain Glyn Dwr, who established relations with the Continent from here in 1404. Hengwrt, a man sion near the ruins of Cymmer Abbey, has given its name to a famous collection of Welch mss. once housed there, and now in the National Library of Wales, Aberystwyth.