Irish Whiskey is a product that must be produced in Ireland if it is to be labeled Irish Whiskey.
There are two kinds of Irish whiskey. One is produced in Northern Ireland, the other in the Republic of Ireland. The northern whiskey contains a blend of malt whiskies, plus grain whiskey. The malt whiskies are distilled at about 171 proof from a mash of barley malt. The grain whiskey is distilled in continuous stills at over 180 proof.
The Republic of Ireland variety is a blend of similarly produced whiskies, distilled at not more than 171 proof in pot stills from a mash consisting chiefly of malted barley, plus small cereal grains including unmalted barley, wheat, oats, and rye.