County Wicklow was a parliamentary constituency in Ireland, represented in the Parliament of the United Kingdom.
From 1801 to 1885 it returned two Members of Parliament (MPs) to the House of Commons of the United Kingdom of Great Britain and Ireland.
Acton resigned by accepting the office of Steward of the Chiltern Hundreds, causing a by-election.
Wentworth-FitzWilliam succeeded to the peerage, becoming 6th Earl FitzWilliam, causing a by-election.
Proby was appointed Comptroller of the Household, requiring a by-election.