Larne Lough (sometimes Larne Loch, Lough Larne or Loch Larne; ) is a sea lough or inlet in County Antrim, Northern Ireland. The lough lies between Islandmagee (a peninsula) and the mainland. At its mouth is the town of Larne. It is designated as an area of special scientific interest, a special protection area, and a Ramsar site to protect the wetland environment, particularly due to the presence of certain bird species and shellfish.