1. California
2. Wisconsin
3. New York
4. Idaho
5. Pennsylvania
6. Minnesota
7. Michigan
8. Texas
9. Iowa
10. Ohio
These states account for over 75% of the milk produced in the United States. California is the largest dairy-producing state, responsible for over 20% of the nation's milk production. Wisconsin is the second-largest dairy state, producing over 15% of the nation's milk.