Abstract: A total of sixty four tannia genotypes were characterized and evaluated based on 16 quantitative characters at Jimma Agricultural Research Center during the 2013/14 cropping season. Sixty two of the genotypes were collected from South, South western and western parts of Ethiopia and two were introduced from Cuba, laid out in 8x8 simple lattice design. The objectives of the present study were to classify genotypes in to smaller groups and to identify the traits accounted for gross diversity of the population. The data was subjected to cluster analysis and genetic divergence analysis. The genotypes were grouped into five clusters according to their similarity level which had significant genetic distance, suggesting the possibility to develop better performing varieties by selecting parents having high mean values for the characters of interest. The principal component analysis further reduced this dataset to four principal components which explained 70.5% of the variation present among the genotypes. The first principal component analysis accounted for 40.3% of the total variation and contributed by discriminating traits of plant height, petiole length, total yield per plant, number of sucker per plant, lamina length, lamina width, number of cormel per plant, plant canopy diameter, corm weight, cormel fresh weight, cormel length, corm length and corm diameter. In general, this study reveals the presence of diversity among the tannia genotypes which can give opportunity for genetic improvement for desirable character. Further, multi location and season evaluation is suggested for future study.