Portmuck
Portmuck is a townland of 235 acres in County Antrim, Northern Ireland. It is situated in the Civil [parishes in Ireland|civil parish] of Islandmagee and the historic barony of Belfast Lower.
The townland has given its name to a little island just off the coast called Isle of [Muck, County Antrim|Isle of Muck], which is a nature reserve.
In 2025, puffins were found to be nesting on the Isle of Muck for the first time in 25 years.