Llandudno Junction (Welsh: Cyffordd Llandudno), once known as Tremarl, is a town in the Conwy County Borough, Wales. It is part of the ancient parish of Llangystennin and is located south of the seaside resort of Llandudno. It adjoins the small town of Deganwy and is to the east of Conwy, which is on the opposite side of the River Conwy.