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

See also

  • Terminology of the British Isles