The borough was disenfranchised by the Acts of Union 1800, with effect from 1 January 1801. £15,000 was paid to the Commissioners of First Fruits to be used at their discretion.
^"Old Leighlin". Ulster Historical Foundation. Retrieved 26 December 2022.
Johnston-Liik, E. M. (2002). History of the Irish Parliament, 1692–1800, Publisher: Ulster Historical Foundation (28 Feb 2002), ISBN1-903688-09-4
Moody, T. W.; Martin, F. X.; Byrne, F. J. (1978). A New History of Ireland 1534-1691. Oxford University Press.
Leigh Rayment's historical List of Members of the Irish House of Commons. Cites: Johnston-Liik, Edith Mary (2002). The History of the Irish Parliament 1692-1800 (6 volumes). Ulster Historical Foundation.