The Auld Lamas Fair is a traditional fair held in Ballycastle, County Antrim, Northern Ireland every year on the last Monday and Tuesday of August. It is associated with the Lammas harvest festival.

The fair has been running for nearly 400 years, dating back to the 17th century.

Various goods are traditionally sold at the fair. These include livestock and traditional foods such as Yellowman, a local variant of honeycomb and ‘dulse’, a type of edible seaweed.

The Fair was filmed by MediAble Productions  in 2000