Bourbon is a variety of whiskey made in America that is barrel-aged and distilled from corn. The name comes from an area with historical significance known as Bourbon County, Kentucky. It dates back to the 18th century and generally is associated with Kentucky. Tennessee also has a whiskey which is considered Bourbon and some may use the name Bourbon on their labels. By law, all Bourbons must contain at least two-thirds corn and be aged for a minimum of four years.