Historically, there were 117 parliamentary boroughs in the Irish House of Commons, of which 80 were disfranchised by the Acts of Union 1800. All but 11 municipal boroughs were abolished under the Municipal Corporations (Ireland) Act 1840. Under the Local Government (Ireland) Act 1898, six of these became county boroughs: Dublin, Belfast, Cork, Derry, Limerick and Waterford. From 1921, Belfast and Derry were part of Northern Ireland and stayed within the United Kingdom on the establishment of the Irish Free State in 1922.
Historically, there were 117 parliamentary boroughs in the Irish House of Commons, of which 80 were disfranchised by the Acts of Union 1800. All but 11 municipal boroughs were abolished under the Municipal Corporations (Ireland) Act 1840. Under the Local Government (Ireland) Act 1898, six of these became county boroughs: Dublin, Belfast, Cork, Derry, Limerick and Waterford. From 1921, Belfast and Derry were part of Northern Ireland and stayed within the United Kingdom on the establishment of the Irish Free State in 1922.