A survey of commercial farmers throughout the United States showed 57 percent were members of marketing/farm supply cooperatives in 1980. An additional 14 percent used those cooperatives as nonmember patrons. Thirty-seven percent of commercial farmers were member-users of marketing cooperatives and 49 percent were member-users of farm supply cooperatives. The greatest proportion of commercial farmers holding cooperative membership was in the Northern Plains, among dairy farmers, and among those farmers with largest farm sales. The smallest proportion holding membership was in the South Central region and among those with smaller farm sales. Twenty-nine percent of all commercial farmers neither held membership in nor patronized any marketing/farm supply cooperative in 1980.