Birr (UK Parliament constituency)

Birr, a division of King's County, was a UK Parliament constituency in Ireland, returning one Member of Parliament 1885–1918.
Prior to the 1885 United Kingdom general election and after the dissolution of Parliament in 1918 the area was part of the King's County constituency.
Boundaries.
This constituency comprised the south-western part of King's County now known as County Offaly. It consisted of the baronies of Ballycowan, Ballyboy and Eglish, Ballybritt, Clonlisk and Garrycastle.