Larne ( — the domain of a Viking chieftain) is a substantial seaport and industrial town on the east coast of County Antrim, Northern Ireland with a population of 18,228 people in the 2001 Census. It has been used as a seaport for over 1,000 years, and is now mostly used by freight. Larne is twinned with Clover, South Carolina.

Larne is administered by Larne Borough Council. Together with the neighbouring district of Carrickfergus and part of Newtownabbey, it forms the East Antrim constituency for elections to the Westminster Parliament and Northern Ireland Assembly.