Aim: To determine the correlation between BMI and Glycated Hemoglobin (HbA1c) Level in Patients of Type 2 Diabetes Mellitus. Methods: This was a cross sectional study was conducted on 110 diabetic patients were diagnosed case of type 2 diabetes mellitus. Informed agreement was obtained from all patients, and each patient was exposed to a complete history and clinical examination, as well as BMI and HbA1c measurements and regular diagnostics. Body height in centimetres (cm) and weight in kilogrammes (kg) were measured while wearing light clothing and walking barefoot, and BMI in kg/m2 was determined. For the measurement of Glycated Hemoglobin (HbA1c), blood was taken in an EDTA vial and manually tested using the resin-exchange technique. Results: This study comprised 110 diabetes patients, 63.64 percent of whom were male and 36.3 percent of whom were female. The majority of patients were overweight (BMI 25-29.9), accounting for about 60(54.55 percent) of all cases, followed by 40(36.36 percent) patients with Normal BMI (18.5-24.9) and 10(9.09 percent) patients with Obese (BMI>40). The BMI value rises, so does the HbA1c level. All individuals with a BMI more than 30 (obese group) had HbA1c levels greater than 8%. Statistical analysis reveals a substantial positive connection between BMI and HbA1c (p value 0.001)