County Monaghan is a former parliamentary constituency in Ireland, returning two Members of Parliament (MPs) to the House of Commons of the Parliament of the United Kingdom.
This constituency comprised the whole of County Monaghan.
Westenra succeeded to the peerage, becoming 3rd Baron Rossmore and causing a by-election.
Leslie's death caused a by-election.
Givan was appointed Crown Solicitor for Kildare and Meath, causing a by-election.