This report documents the extent of use of one-member, one-vote and proportional voting systems in the U.S. by type and function, and membership size for direct-membership, federated, and mixed membership cooperatives. It also documents the extent of use of at-large, geographic districting, and delegate systems, as well as combinations of at-large with districting and delegate systems by type and function and by region. The report finds one-member, one-vote, and at-large systems predominate.