Oysterhaven (Irish: Cuan Oisre) is a sea inlet on the coast of County Cork, Ireland, immediately to the east of Kinsale harbour.
The townlands bordering the northern and eastern sides of the inlet are also known as Oysterhaven.
During the Siege of Kinsale, the English forces besieging the town brought supplies to their camp (which was located to the north of the town) by ship into Oysterhaven and thence by boat up the creek to Brown's Mills.
Located in a rural setting on the bank of Oysterhaven bay, this is a very striking feature in the landscape.
It is thought to have been burnt by its owners only twelve years after its construction, in 1643.