Picton Castle is a medieval castle near Haverfordwest in Pembrokeshire, Wales. Originally built at the end of the 13th century by a Flemish knight, it later came into the hands of Sir John Wogan, and is till this day inhabited by his descendants, the Philipps family (see Baron Milford and Viscount St Davids). It is of unusual construction and has been remodelled several times during its history. It is a Grade I listed building.