An American Viticultural Area (AVA) is a designated appellation for American wine in the United States distinguishable by geographic, geologic, and climatic features, with boundaries defined by the Alcohol and Tobacco Tax and Trade Bureau (TTB) of the United States Department of the Treasury. As of August 2022, there are 267 recognized AVAs in 34 states—several of which are shared by two or more states. Over half (147) of the AVAs are in California.