When it comes to US wine production, California is King. California wines account for almost 90% of all wines produced in the United States each year, and is home to the most celebrated vineyards and producers in the country. California is probably best known for its world-famous Cabernets and Chardonnays, many of which hail from its two most-acclaimed AVAs, Napa Valley and Sonoma County. Other prominent grapes used in California wines include Merlot, Pinot Noir, Sauvignon Blanc, Syrah, and Zinfandel (which California made popular).
The United States now ranks fourth in the world in wine production behind, France, Italy, and Spain. While about 90% of that wine is produced in California, other states like Oregon, New York, and Washington are establishing themselves as prime spots for wine production, as well. Just about any variety of wine can be found in production somewhere in the United States.