Seven-day-old hypocotyls of 149 bean cultivars were inoculated with Rhizoctonia solani and incubated in a growth chamber for 72 hours at 30°C. Based on the mean size of the largest lesion, and 10 most resistant cultivars were: ‘Dwarf Horticultural Long Pod’, ‘Yellow Eye’, ‘White Kidney’, ‘Romano Pole’, ‘French Horticultural’, ‘Red Kidney’, ‘Manitou’, ‘Sutter Pink’, ‘Wren’s Egg’, and ‘Red Mexican UI 37’. The mean largest lesion for ‘Dwarf Horticultural Long Pod’ (the most resistant) was 3.0 mm2 while that for the Bush Blue Lake 274 (susceptible) was 64.4 mm2. These 10 cultivars were further tested using 5 different isolates of R. solani. ‘Yellow Eye’ was the most resistant to all 5 isolates with a mean largest lesion size of 10.0 mm2 while ‘Bush Blue Lake’ had a mean lesion size of 90.9 mm2. The root rot ratings were highly correlated with the areas of the largest lesion, and the number of lesions. ‘White Kidney’ was the only white-seeded resistant cultivar.