Great Britain and Ireland

Great Britain and Ireland may refer to:


 * The United Kingdom of Great Britain and Ireland, the sovereign state created in 1801, combining the former Kingdom of Great Britain with Ireland, separated by the Anglo-Irish Treaty of 1921
 * Great Britain and Ireland, the two largest islands in the British Isles
 * The present-day United Kingdom and the Republic of Ireland, two sovereign states
 * Ireland–United Kingdom relations, the relations between the Republic of Ireland and the United Kingdom