Cwm Cadnant is a community and former electoral ward in Anglesey, north Wales. Named after the local river, Afon Cadnant, which flows through it, the community takes in the area between the Menai Bridge and Beaumaris. The community includes the villages of Llandegfan, Hen Bentref Llandegfan and Llansadwrn as well as the settlement of Bryn-minceg and at the 2001 census it had a population of 2,222, increasing slightly to 2,254 at the 2011 census.