Scotch whisky is whisky made in Scotland that follows specific legal regulations. It is divided into five categories: single malt, single grain, blended malt, blended grain, and blended Scotch whisky.
Irish whiskey is whiskey made in Ireland that is usually triple distilled and made from a variety of grains. It may include single malt, single pot still, single grain, and blended Irish whiskey varieties.
Bourbon whiskey is whiskey made in the United States that is made from a mash that is at least 51% corn and aged in new charred oak barrels. It may include straight bourbon, bottled-in-bond bourbon, and blended bourbon varieties.
Rye whiskey is whiskey made in the United States or Canada that is made from a mash that is at least 51% rye and aged in charred oak barrels. It may include straight rye, rye malt, and Canadian rye whisky varieties.
Tennessee whiskey is whiskey made in Tennessee that is similar to bourbon but undergoes a filtering process called the Lincoln County Process, which involves passing the whiskey through charcoal before aging. It is a type of straight whiskey that must be distilled in Tennessee and meet the legal requirements of bourbon.