California bonded wineries

Table I. Frequency Distribution of Size of California Bonded Winery Premises December 31, 1941, 1965, and 1977...

Although, owing to changes in ownership, etc, it is impossible to give a permanently accurate number, there are presently (ca 1997) about 940 active bonded wineries in California and about an equal number in other states. One California winery is generally conceded to be the largest in the world, shipping about 50 x 10 cases (1 case = 12 bottles, 750 mL each) per year, or about 35% of the California total. 

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