The Emerald Isle; or, The Caves of Carrig-Cleena, is a two-act comic opera, with music by Arthur Sullivan and Edward German, and a libretto by Basil Hood. It premiered at the Savoy Theatre on 27 April 1901, closing on 9 November 1901 after a run of 205 performances. There was also a brief run in New York at the Herald Square Theatre for just 50 performances, opening on 1 September 1902, and closing on 18 October 1902.
Modern professional productions of the work have been rare. The Prince Consort recorded the piece in Britain live in performance at the fringe of the Edinburgh Festival in 1982. The piece was also given in Edinburgh and then Torquay, England, in 1998. Amateur groups in Britain produced the piece regularly through the 1920s and occasionally thereafter. A concert of the opera was performed by Valley Light Opera in Amherst, Massachusetts on March 8, 2008 with a narration written by Jonathan Strong. This was the first known U.S. performance of the opera with full orchestra since 1902.