Lifford (Irish: Leifear, historically anglicised as Liffer) is the county town of County Donegal, Ireland, the administrative centre of the county and the seat of Donegal County Council, although the town of Letterkenny is often mistaken as holding this role.
Lifford lies in the Finn Valley area of East Donegal where the River Finn meets the River Mourne to create the River Foyle. The Burn Dale (also spelt as the Burn Deele), which flows through Ballindrait, flows into the River Foyle on the northern outskirts of Lifford.