Bourbon (whiskey), named for Bourbon County, Kentucky, is a corn whiskey aged in charred oak barrels. It was proclaimed the U.S. National Spirit by an act of Congress in 1964.

Well, the most popular type of liquor in most U.S. states is whiskey, but vodka is a close second. Meanwhile, staple liquors like tequila and rum aren't the most popular liquor in nearly as many states, so the gap between whiskey and vodka and the other liquors is quite large.

Two of the more popular American spirits during the first century and a half of colonization were peach brandy, made mainly in the Southern colonies, and applejack (a brandy distilled from cider), which probably originated in or around New Jersey.

There are six primary liquors — whiskey, brandy, vodka, rum, gin and tequila. These beverages fall under the liquor category because they use a similar distilling method, but each has a distinct flavor that arises from using different ingredients and aging processes.