USDA’s organic regulatory program data show that organic farm production and food-handling operations are concentrated in California (the country’s top fruit and vegetable producer), the Northeast (which has many small-scale organic farms), and the Upper Midwest (a major producer of organic milk). Northeastern States have the highest share of certified organic farmers, particularly Vermont and Maine, where 5 percent and 6 percent, respectively, of all farmers are certified organic. In California, more than 3.6 percent of all farmers are certified organic.
Organic processors, manufacturers, and other food-handling operations are concentrated around large metropolitan areas, while certified organic livestock operations are located predominantly in the Great Lakes region. Southern States have historically had the fewest organic operations, although USDA data show that several of these States have seen high growth recently. In New York, Indiana, North Carolina, Missouri, and Texas, more than half of organic producers were newly certified in 2013.
The top 10 States for organic farm sales were California, Washington, Pennsylvania, Oregon, Wisconsin, New York, Texas, Michigan, Colorado, and Arizona. These States accounted for 78 percent of the total value of all U.S. certified organic commodities sold in 2015. California alone contributed 39 percent of total U.S. organic farm sales.
source: USDA - Growing Organic Demand Provides High-Value Opportunities for Many Types of Producers