Background: As one of the important genetic resources for Ongole beef cattle, the study aimed to identify any potential polymorphisms in the Bone Morphogenetic Protein 15 gene in a group of Sumba Ongole (SO) cattle. Methods: Blood samples from 161 SO cattle were obtained and examined. The initial stage was the isolation of deoxyribonucleic acid (DNA). The next procedures were electrophoresis and extraction, followed by annealing temperature optimization, amplification and sequencing. The Basic Local Alignment Search Tool (BLAST) was used to examine the sequencing findings. The annealing temperature was 58°C for 15 seconds, with an amplification gain of 350 base pairs (bp). Result: The result showed that there were six single nucleotide polymorphisms (SNPs) of the BMP 15 gene in this region. Six mutations were SNP c.57 G greater than A, SNP c.120 C greater than T, SNP c.338 G greater than T, SNP c.360 C greater than A, SNP c.361 G greater than T, SNP c.365 A greater than T. The polymorphic informative content (PIC) value (0.25 less than =PIC less than =0.5) was reached from low (0.02) to moderate high (0.45 and 0.47). A total of 2 SNPs in the BMP 15 gene with moderate-high PIC value was c.360 C greater than A and c.365 A greater than T. In conclusion, we reported for the first time the polymorphism of the BMP 15 gene which is required for further investigation as to whether this polymorphic could be responsible for reproductive trait variations in Ongole cattle.