Tennessee whiskey or Tennessee whisky is a protected name] for a sour mash of American whiskey that undergoes a filtering stage called the Lincoln County Process, in which the whiskey is filtered through a thick layer of maple charcoal before it is put into casks for aging. This step gives the whiskey a distinctive flavor[specify].
The process itself is named for Lincoln County, Tennessee, which is where the Jack Daniel's distillery was originally located. In 1871, the Jack Daniel's distillery and the surrounding area became part of the newly created Moore County.
Currently, there are only two brands of Tennessee whiskey on the market: Jack Daniel's and George Dickel. However, in 2009 the Tennessee General Assembly amended the statute that had for many years limited the distillation of drinkable spirits to just three of Tennessee's 95 counties (Lincoln, Moore, and Coffee). The revised law allows distilleries to be established in 41 additional counties. This change was expected to lead to the establishment of small distilleries, thus increasing the number of producers of Tennessee whiskey.
Tennessee whiskey is the source of the name of the country music song "Tennessee Whiskey" by Dean Dillon, a hit for George Jones in 1983.