Prairie Farms Dairy is a dairy cooperative founded in Carlinville, Illinois, and now headquartered in Edwardsville, Illinois, a suburb of St. Louis. As a dairy cooperative, Prairie Farms receives milk from producers and converts it into many different products, including cheese, butter, ice cream, sour cream, cottage cheese, various dips, yogurt, and fluid milk. Prairie Farms also produces and sells juices, flavored drinks, and pre-made iced tea.