|Forty six rice varieties were evaluated at Raipur (Chhattisgarh) under heat stress tolerance condition to assess the genetic diversity for grain yield with yield attributing traits. Genetic divergence based on Mahalanobis D2 statistic grouped the 46 rice varieties into five clusters. The cluster V contained the highest fourteen varieties while the clusters III, IV, I and II comprised 10, 10, 6 and 6 varieties, respectively. Maximum intra cluster distance was observed was observed in cluster V (3.004) followed by cluster IV (2.927) indicating hybridization involving varieties within the same clusters which may result in good cross combinations. The maximum inter cluster distance was observed between cluster III and II (4.926) followed by cluster IV and III (4.812) indicating wider genetic diversity between varieties. For THE following characters, days to 50% flowering, plant height, effective tiller/plant, panicle length, leaf length, leaf width, total number of grains/panicle, filled grains/panicle, unfilled grains/panicle, spikelet fertility percentage, spikelet sterility percentage 100 grain weight, panicle/square meter and yield/plant, the highest mean values was found in cluster II, IV, V, II, V, I, IV , IV, IV, III, II, III, V and III respectively. The lowest mean values for the above characters was found in cluster V, I, II and IV, IV, III, III, V, II, III, II, III, II, II and II respectively.