From 2015 to 2017, California and Florida accounted for 86 percent and 13 percent of U.S. avocado production, respectively, while the west-central Mexican States of Michoacán and Jalisco accounted for 78 percent and 8 percent, respectively, of Mexican production. From 2015 to 2017, growers and shippers in Michoacán supplied about 72 percent of total deliveries (imports and domestic production) of fresh avocados in the United States; California supplied about 13 percent.
Source: https://www.ers.usda.gov