The Glasgow Cooperative and Ray-Carroll Grain Growers, two successful farm supply-marketing cooperatives in Missouri, have made significant contributions to their 6,700 members and to their communities. Organized in 1923 and 1931, respectively, these cooperatives have developed grain marketing and storage facilities, dependable sources of farm supplies, a wide variety of related service for farmers, and a competitive influence on other agribusiness firms in the trade area. The study also points out the cooperatives' contributions to the welfare of local business communities, including participation in local activities and leadership.