I've never seen a definitive count on the number of wineries in the US, let alone the world (just what actually constitutes a winery? Making wine of course, but in what quantity, does it need to be commercial? What about Farm Wineries? It's all very confusing).
Anyway, there's a lot - we have about 38,000 in the database. A lot of duplicates I'm sure, but there are still tens of thousands, and probably that many again that we have yet to add.
One fact is that Washington state now has 500 - Sweet Valley Wines of Walla Walla holding the distinction of being number 500. Their first release is 300 cases of a 2005 Double Barrel Red (a Merlot/Cabernet/Syrah blend). [No, they arent in the Snooth index yet - anyone who's tried the wine should add it though.]
The second fact is that each of the 50 states has at least one winery (note, thats winery not vineyard). South Dakota, for example, now has 12.
With California having around 2,500 my guess is that there are 5,000 wineries in the US and we could reach 6,000 by the end of the decade.
Just how many are there
- Blog comment by Jason Eckenroth, Jun 25, 2007.
Pretty good guess! We've relied upon Wine Business Monthly's annual update on the number of US wineries (since 2004):
# of US wineries (includes bonded & non-bonded):