a market-town of N. Wales, partly in Carnarvonshire, but principally in Denbighshire, situated on both banks of the Conway, in a valley surrounded by well-wooded hills, 17 miles W.S.W. of Denbigh. The old church, an erection of the fifteenth century, and built on the site of a much older one, contains some interesting monuments. Inigo Jones furnished the design of the Gwydir chapel, in the south transept, which, among other curious relics, has the large stone coffin of Llewelyn the Great, son-in-law of King John. The bridge across the Conway was built in 1636, from designs by the same eminent architect. At one period, Llanrwst was celebrated for the manufacture of Welsh harps; there was also, somewhat later, a good deal of woollen-yarn spinning and stocking-knitting carried on, but neither of these is now of much importance. Coals and lime are brought up the river to Trefriw, and slate and iron sent in return. The markets are on Tuesday and Saturday. Llanrwst is celebrated for the excellence of its salmon-fishing. Pop. of parish 3984.