Cemaes Head (formerly Cemais, and historically anglicised as Cemmaes, Kemmaes or Kemmes) (Welsh: Pen Cemaes or Trwyn Cemaes) is a headland and nature reserve in north Pembrokeshire. It lies in the community of St Dogmaels, within the Pembrokeshire Coast National Park. To the west and north it overlooks Cardigan Bay, and to the east Cardigan Island and the estuary of the River Teifi.