Probably the most famous and best-known wine-growing region in California ( North Coast region) and also in the USA. The name Napa comes from the indigenous people and probably means house. It is by far the largest part of the political district Napa County, but is also often used as a synonym for it. People mostly say Napa Valley but not so rarely mean Napa County. This is also helped by the fact that the AVA designation Napa Valley may be used alternatively for wines from the whole of Napa County. The other AVA areas of Napa County, apart from the second largest area Los Carneros, are more or less only small enclaves within the large area with 18,000 hectares of vineyards. The 16 AVA areas are Atlas Peak, Chiles Valley, Diamond Mountain, Howell Mountain, Los Carneros, Mount Veeder, Napa Valley, Oak Knoll District, Oakville, Rutherford, St. Helena, Spring Mountain District, Stags Leap District, Wild Horse Valley and Yountville.