Prior to the 1885 general election the area was part of the Mayo constituency.
From 1922, on the establishment of the Irish Free State, it was not represented in the UK Parliament.
This constituency comprised the eastern part of County Mayo.
1885–1922: That part of the barony of Costello not contained within the constituency of South Mayo and that part of the barony of Gallen not contained within the constituency of North Mayo.
This article about a Historic Westminster constituency in Ireland is a stub.