Aberdaugleddau, mouth of the two rivers ‘Cleddau' or in English Milford Haven, is a town and community in Pembrokeshire, Wales. It is located on the north side of the Milford Haven Waterway, an estuary that forms a natural harbour and has been used as a port since the Middle Ages.
The town was founded in 1790 by Sir William Hamilton, who designed a grid street pattern. He intended it to be a whaling centre, but by 1800, it had developed into a Royal Navy dockyard, which it remained until the dockyard was transferred to Pembroke in 1814. It then became a commercial dock, with the focus shifting in the 1960s, following the construction of an oil refinery built by Esso, to logistics for fuel oil and liquefied gas.