Ireland (Irish: Éire) is a European island in the Atlantic Ocean, and next to Great Britain.
The Simpsons once visited Ireland when Grampa told them he wanted to visit a pub he used to go, the O'Flanagan's Pub. While Homer and Grampa were at the pub, Marge, Bart, and Lisa visited the Blarney Castle, the Giant's Causeway and the Guinness Brewery. 
- Episode – "Homer vs. the Eighteenth Amendment" (Mentioned)
- THOH – "Treehouse of Horror XII" (Mentioned)
- Episode – "The Great Louse Detective" (Mentioned)
- Episode – "Margical History Tour" (Mentioned)
- Episode – "The Father, the Son and the Holy Guest Star" (Mentioned)
- – The Simpsons Movie (Mentioned)
- Episode – "Sex, Pies, and Idiot Scrapes" (Mentioned)
- Episode – "In the Name of the Grandfather"