Plomesgate is a hundred of Suffolk, consisting of 41,579 acres (168.26 km2). Plomesgate Hundred comprises the historic ports of Aldeburgh and Orford, the medieval market town of Saxmundham and twenty other parishes in the east of the county. It forms a strip around 14 miles long and up to 9 miles wide running south-east from near Framlingham to the North Sea. It is bounded on the east by the sea, on the north by Blything Hundred, on the west by Hoxne and Loes Hundreds and on the south by the Butley River which flows into the River Ore near Orford Ness.