SummaryThe polymorphism of human leucocyte antigen (HLA)‐A, ‐B and ‐DRB1 genes and their computed haplotype analysis results from a population of Jiangsu province of China are presented here. The data consist of 20 248 unrelated peripheral blood stem cell donors in Jiangsu Branch of Chinese National Marrow Donor Program registry. In total, 18 different HLA‐A alleles, 34 different HLA‐B alleles and 13 different HLA‐DRB1 alleles were found in Jiangsu Han population. The most frequent alleles in HLA‐A, ‐B and ‐DRB1 loci were A*02 (29.55%), B*15 (14.40%), and DRB1*09 (16.15%), respectively. The most common haplotype in A‐B‐DRB1 loci was A*30‐B*13‐ DRB1*07 (6.92%), in A‐B loci was A*30‐B*13 (8.05%), in B‐DRB1 loci was B*13‐DRB1*07 (8.17%), and in A‐DRB1 loci was A*02‐DRB1*09 (8.30%). The dendrogram study indicated that the distribution of HLA genes in Jiangsu Han population, as expected, represented a mixture of Northern and Southern Han population in China. These findings could shade new lights in population genetics and anthropology studies of Han‐Chinese.