The parliamentary borough of Sligo, County Sligo, Ireland, was represented in the House of Commons of the United Kingdom as a borough constituency from 1801 to 1870 by one Member of Parliament (MP), elected by the first past the post system of election. It succeeded the two-seat constituency of Sligo represented in the Irish House of Commons until the abolition of the Irish Parliament on 1 January 1801 under the Acts of Union 1800. It was disfranchised under the Sligo and Cashel Disfranchisement Act 1870.