Jameson is a Single distillery Irish whiskey founded in 1780, produced at Midleton Distillery, Cork, by John Jameson and Son. Jameson Irish Whiskey is known for its distinctive flavour and smooth characteristics. Its distilled from the finest Irish barley and pure spring water and then matured in oak casks. Jameson 1780 12 Y.O. Whiskey matured for a minimum of 12 years in Olorroso Sherry and bourbon.