Barnyard millet is a nutritious, small millet crop grown in rainfed condition, consumed just like rice. Reducing the duration for maturity is an important breeding objective and assessing the phenotypic diversity help in identifying those genotypes with desirable traits. Twenty-seven genotypes were subjected to D2 analysis which revealed the presence of eight different clusters. Cluster I had the maximum number of genotypes. Cluster II had five genotypes, cluster III had three genotypes and in cluster IV, V, VI, VII and VIII with one genotype each. Early maturing germplasm were in cluster III and the check MDU1 was in separate cluster VII. The percentage contribution of the traits towards divergence was maximum by grain yield/plant followed by plant height and net by days to maturity. Stability analysis of these genotypes in three different environments revealed the stable genotypes with high mean were ACM BM-20-019 and MDU1. E2 was the least interactive environment. Using What- Won- Where biplot, the three test environments were divided into two mega environments. In light of this, the genotype ACM BM-20-016 performs well in mega environment 1 (E1), while the genotypes ACM BM-20-019, MDU 1, and ACM BM-20-012 perform similarly in mega environment 2. (E2 and E3).