Killybegs is a town in County Donegal in Ulster, Ireland. It is the second largest fishing port in the county and on the island of Ireland. It is located on the south coast of the county, north of Donegal Bay, near Donegal Town. The town is situated at the head of a scenic harbour and at the base of a vast mountainous tract extending northward. In the summer, there is a street festival celebrating the fish catches and incorporating the traditional "Blessing of the Boats".