Principal component analysis and cluster analysis were carried out at Tamil Nadu Rice Research Institute, Aduthurai to identify diverse sunnhemp genotypes for biomass yield and suitable genotypes for yield and yield-related parameters. In order to determine the relationship and genetic diversity among 67 sunnhemp genotypes a field study was conducted at Tamil Nadu during Kharif, 2021. Multivariate analysis such as principal component analysis, cluster analysis have been analysed using R software. Phenotypic analysis revealed significant genetic variability among the accessions for biomass yield leading to identification of several promising accessions. Cluster analysis and PCA grouped the 67 sunnhemp accessions into four clusters. Cluster I and IV are highly divergent harboring contrasting accessions. Plant production traits such as plant height, leaf breadth, basal stem diameter, yield and number of leaves had the majority contribution in the first two principal components.