Old Colwyn is a village just to the east of Colwyn Bay, in Conwy County Borough, Wales.

Colwyn Bay is a town, community and seaside resort in Conwy County Borough on the north coast of Wales overlooking the Irish Sea. It lies within the historic county of Denbighshire. Eight neighbouring communities are incorporated within its postal district. Established as its own separate parish in 1844 with just a small grouping of homes and farms where the community of Old Colwyn stands today, Colwyn Bay has expanded to become the second-largest community and business centre in the north of Wales as well as the 14th largest in the whole of Wales with the urban statistical area, including Old Colwyn, Rhos-on-Sea, and Mochdre and Penrhyn Bay, having a population of 34,284 at the 2011 census.