Patriot Parliament is the name commonly used for the Irish Parliament session called by King James II during the Williamite War in Ireland which lasted from 1688 to 1691. The first since 1666, it held only one session, which lasted from 7 May 1689 to 20 July 1689. Irish nationalist historian Sir Charles Gavan Duffy first used the term Patriot Parliament in 1893.

The Parliament of Ireland was the legislature of the Lordship of Ireland, and later the Kingdom of Ireland, from 1297 until the end of 1800. It was modelled on the Parliament of England and from 1537 comprised two chambers: the House of Commons and the House of Lords. The Lords were members of the Irish peerage and bishops. The Commons was directly elected, albeit on a very restricted franchise. Parliaments met at various places in Leinster and Munster, but latterly always in Dublin: in Christ Church Cathedral, Dublin Castle, Chichester House (1661–1727), the Blue Coat School (1729–31), and finally a purpose-built Parliament House on College Green.