The Creuddyn Peninsula (Welsh: Y Creuddyn) is a small peninsula in Conwy County Borough in Wales.
[citation needed] It is bordered roughly by the Irish Sea, the River Conwy, Conwy Bay and the A55 expressway.
There are several limestone hills of around 100 metres in height, including Bryn Euryn, Bryn Pydew, Mynydd Pant, Coed Gaer, Bryniau, and Deganwy Castle.
The area is usually called simply Y Creuddyn, being the Welsh name of the medieval commote (an administrative unit within a cantref) roughly corresponding to the peninsula itself, though somewhat larger.
[1] The Welsh-medium secondary school Ysgol y Creuddyn is situated on the peninsula.