The Irish Unionist Alliance (IUA), also known as the Irish Unionist Party or simply the Unionists, was a unionist political party founded in Ireland in 1891 from the Irish Loyal and Patriotic Union to oppose plans for home rule for Ireland within the United Kingdom of Great Britain and Ireland. The party was led for much of its existence by Colonel Edward James Saunderson and later by William St John Brodrick, Earl of Midleton. In total, eighty-six members of the House of Lords affiliated themselves with the Irish Unionist Alliance, although its broader membership was relatively small.