Buncrana is a town in Inishowen in the north of County Donegal in Ulster, the northern province in Ireland. The town sits on the eastern shores of Lough Swilly, being 23 kilometres (14 mi) northwest of Derry and 43 kilometres (27 mi) north of Letterkenny. In the 2022 census, the population was 6,971, making it the second most populous town in County Donegal, after Letterkenny, and the largest in Inishowen.