Old Colwyn (Welsh Hen Golwyn), is a small town just to the east of Colwyn Bay, in Conwy County Borough, Wales.
Prior to local government reorganisation in April 1974 it was part of the Municipal Borough of Colwyn Bay, but the reorganisation established it as a separate community, whose population at the 2001 census was 7,626. It hosted the National Eisteddfod in 1941. It also harbours the 3rd Colwyn Bay (Old Colwyn) Scout Group headquarters and is home to the area's comprehensive school, Ysgol Bryn Elian