Technical Abstract: Bacterial soft rot is a serious disease in potato (Solanum tuberosum L.), causing rapid tuber tissue maceration and, consequently, marketable yield loss. Soft rot bacteria, especially Pectobacterium carotovorum subsp. carotovorum (Pbc), are favored by moist conditions, which are prevalent in large potato storage facilities. However, although most potatoes in North America are stored before use, there are no published surveys of soft rot resistance in cultivars exposed to long-term storage conditions. Thus, we tested sixty-five cultivars and thirteen breeding lines for soft rot resistance after six months of storage. There was a significant effect of cultivar and production environment on resistance score. The three most resistant cultivars to soft rot were Freedom Russet, Anett, and Alaska Red Eye.