Creuddyn may refer to:The Creuddyn Peninsula, in Conwy county borough Creuddyn, Ceredigion, a historic commote of Ceredigion Creuddyn, Rhos, a historic commote of Cantref Rhos Llanfihangel y Creuddyn, a village and parish in Ceredigion Ysgol y Creuddyn, a secondary school in Penrhyn Bay