Birr, a division of King's County, was a constituency in Ireland, returning one Member of Parliament to the United Kingdom House of Commons from 1885 to 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.

Members of Parliament

Elections

Elections in the 1880s

Elections in the 1890s

Elections in the 1900s

Elections in the 1910s