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Sorghum is one of the most important cereal crops grown in arid/semi-arid regions of the world. Understanding and utilising the genetic variation in sorghum accessions is essential for improving the crop to adapt to abiotic and biotic constraints. Several authors have reported the loss of sorghum diversity, but there is limited available information on on-farm sorghum diversity in the major sorghum growing areas in Uganda hence limiting the utilization of diversity for improvement of the crop. This study was carried out to determine sorghum diversity on farmers’ fields in Uganda. Phenotypic data was used to assess diversity in 100 sorghum accessions collected from Northern and Eastern regions of Uganda. The accessions were phenotyped using qualitative and quantitative morphological characteristics. Phenotypic evaluation was done using 10× 10 Alpha lattice design with two replications at Pakor village in Agago …