Letterkenny

Letterkenny, nicknamed 'the Cathedral Town', is the largest and most populous town in County Donegal, Ireland. It lies on the River Swilly in East Donegal in the west of Ulster, and has a population of 19,274. It is the 36th largest settlement in all of Ireland by population, and is the 15th largest settlement by population in the province of Ulster. Along with the nearby city of Derry, Letterkenny is considered a regional economic gateway for the north-west of Ireland. Letterkenny acts as an urban gateway to the Ulster Gaeltacht, similar to Galway's relationship to the Connemara Gaeltacht.

Letterkenny began as a market town at the start of the 17th century, during the Plantation of Ulster. A castle once stood near where the Cathedral of St Eunan and St Columba, County Donegal's only Catholic cathedral, stands today.