Tennessee whiskey is straight whiskey produced in the U.S. state of Tennessee. Although it has been legally defined as a bourbon whiskey in some international trade agreements, most current producers of Tennessee whiskey disclaim references to their products as "bourbon" and do not label them as such on any of their bottles or advertising materials. All current Tennessee whiskey producers are required by Tennessee law to produce their whiskeys in Tennessee and – with the sole exception of Benjamin Prichard's – to use a filtering step known as the Lincoln County Process prior to aging the whiskey. Beyond the perceived marketing value of the distinction, Tennessee whiskey and bourbon have almost identical requirements, and most Tennessee whiskeys meet the criteria for bourbon.

Bourbon is a type of barrel-aged American whiskey made primarily from corn (maize). The name derives from the French Bourbon dynasty, although the precise source of inspiration is uncertain; contenders include Bourbon County in Kentucky and Bourbon Street in New Orleans, both of which are named after the dynasty. The name bourbon may not have been used until the 1850s, and the association with Bourbon County was not evident until the 1870s.