Background and Aim: Diabetes is a metabolic disorder that can affect nearly all organ systems in the body. Obesity and insulin resistance are risk factors for type II diabetes; while the amount of insulin the body produces in obese people is normal, it may not be enough to meet the body's needs. The study aimed to compare glycosylated hemoglobin among obese and non-obese diabetic patients. Method and Material: A case-control study design was conducted on (80) type II diabetic patients who attended Al-Wafaa Specialized Centre for Diabetes and Endocrinology by purposive sampling at Mosul city in Northern Iraq for a period extended from 25th December 2021 to 10th February 2022. The estimation of HbA1c was done by using BS230 Mindray. Results: Patients with type II diabetes who are obese exhibit a considerable rise in HbA1c levels, with a mean of (9.50 ± 1.90) compared to (8.10 ± 1.90) in non-obese type II diabetic patients at P-value = 0.002 (t-test =3.191). Conclusions: The HbA1c levels are higher in obese type II diabetes patients than in non-obese diabetic patients.