Ireland was home to a thriving distilling industry until the early 20th century, when a decline in quality combined with seismic global events (world wars, prohibition, etc.) led to the closure of most of the distilleries.
A large amount of Irish whiskey is triple distilled, some of it comes from pot stills, some from column stills, and some a blend of both.
Single Malt Irish Whiskey follows the same regulations as Scotch (100% malted barley, copper pot still, single distillery).
Single Pot Still Whiskey is a mixture of malted and unmalted barley distilled in a pot still at one distillery.
Grain whiskey and blended whisky, such as Jameson, are also produced following regulations similar to that of Scotch grain and blended whisky.