The Royal Irish Yacht Club is a yacht club located in Dún Laoghaire Harbour, County Dún Laoghaire–Rathdown, Republic of Ireland. The club was founded in 1831, with the Marquess of Anglesey, who commanded the cavalry at the Battle of Waterloo being its first Commodore. John Skipton Mulvany designed the clubhouse, which still retains a number of original architectural features since being opened in 1851.