County Cavan was a parliamentary constituency in Ireland, which from 1801 to 1885 returned two Members of Parliament (MPs) to the House of Commons of the United Kingdom of Great Britain and Ireland.
This constituency comprised the whole of County Cavan.
From 1801 to 1885 County Cavan was one constituency with two Members of Parliament, who both represented the whole of the county.
John Maxwell-Barry succeeded as 5th Baron Farnham, causing a by-election.
Henry Maxwell succeeded to the peerage, becoming 7th Baron Farnham and causing a by-election.
Somerset Maxwell resigned, causing a by-election.
John Young was appointed a Commissioner of the Treasury, requiring a by-election.
Henry John Clements's death caused a by-election.
John Young was appointed Chief Secretary of Ireland, requiring a by-election.
John Young resigned after being appointed Lord High Commissioner of the Ionian Islands, causing a by-election.