Leitir Mhic an Bhaird or Leitir Mhic a' Bhaird (anglicised as Lettermacaward) is a Gaeltacht village in the Rosses region of County Donegal, Ireland. The village, known colloquially as Leitir (pronounced letcher), is between the larger towns of Glenties and Dungloe. It is also a civil parish in the historic barony of Boylagh. The village has two shops, a family run service station and three 3 pubs.
There are approximately 650 people living in the Leitir Mhic an Bhaird ED and 19% Irish speakers.
The local Gaelic games club is Na Rossa.
The civil parish contains the village of Lettermacaward.
The civil parish contains the following townlands: