Introduction and Aim: Hyperthyroidism is a disorder characterized by excessively high amounts of tri-iodothyronine and thyroxine in the bloodstream. TPO is a thyroid-specific antigen. TPO gene mutations affect thyroid hormone synthesis, causing full or partial iodide organification abnormalities. In this study, we aimed to look at the single nucleotide polymorphisms (SNPs) in the TPO gene and find possible relation of these SNPs to the development or prognosis of hyperthyroidism. Materials and Methods: Blood samples were collected from hyperthyroid patients (n=75) and healthy individuals (n=25). The concentration of triiodothyronine (T3), Tetra-iodothyronine (T4), and thyroid stimulating hormone (TSH) were estimated in all samples. The autoantibodies TPOAbs and TR-Ab levels were measured using the ELISA assay. The extracted genomic DNA from blood of participants was investigated for polymorphism in the SNPs rs1126799, rs1126797, and rs732609 within the TPO gene. Statistical methods were used to evaluate the association between the TPO SNPs studied to hyperthyroidism susceptibility. Results: No significant correlation was observed between the SNPs studied and prognosis of hyperthyroidism. However, it was found that hyperthyroid patients carrying the TPO rs1126799 T allele (CT + CC genotypes) had significantly higher serum levels of TPOAb compared to those with the TT genotype (P<0.01). Similarly, hyperthyroid patients with the TPO rs1126797 C allele (CT + TT genotypes) and TPO rs732609 A allele (CA + AA genotypes) exhibited significantly elevated levels of TPOAbs compared to individuals with the CC genotype and AA genotype, respectively (P<0.01). Conclusion: There was no correlation between the TPO rs1126799, rs1126797, and rs732609 polymorphisms with the occurrence of hyperthyroidism in the Iraqi population. However, TPO rs2071400 and rs2048722 polymorphisms were found to be correlated to serum levels of TPOAb.