HomeCooperatives Agricultural Cooperatives by States Agriculture Co-ops in Illinois Tags CO CT DE GA IA IL IN KS KY MA MD ME MI MN MO MS NC ND NE NH NJ NY OH PA RI SC SD TN TX VA VT WI WV Tags hide tags Landmark Services Cooperative Landmark Services Cooperative is a member-owned agriculture cooperative headquartered in Cottage Grove, Wisconsin. The cooperative provides agronomy, energy, feed, grain, and logistics products and services to its customers in Wisconsin, Illinois, and Iowa. Growmark Cooperative Growmark Inc. is an agricultural supply cooperative that provides products, services, and grain marketing in the Midwest and Ontario, Canada. Growmark’s core member cooperatives that use the name FS are located in Illinois, Iowa, and Wisconsin. Foremost Farms USA Foremost Farms USA is a farmer-owned dairy cooperative headquartered in Wisconsin focused on producing cheese, butter, and whey ingredients. Co-Alliance Cooperative Co-Alliance LLP is a member-owned cooperative focused on innovative solutions in agronomy, grain marketing, energy, and swine/animal feed that serves its members and non-member clients across Indiana, Ohio, Illinois, and Michigan.