Background: Gallstone disease (GSD) and diabetes mellitus (DM) are common disorders that often coexist due to overlapping metabolic risk factors, including obesity, insulin resistance, and dyslipidemia. The coexistence of these conditions contributes to increased risk of complications and poorer clinical outcomes. This study aimed to determine the frequency of diabetes mellitus among patients diagnosed with gallstones at private hospital, providing insight into the metabolic burden in this population. Methods: An observational study was conducted from March 2021 to October 2021 involving 51 adult patients diagnosed with gallstones via abdominal ultrasonography. Patients with pregnancy, or under 18 years were excluded. Data on demographics, clinical history, fasting plasma glucose, and glycated hemoglobin (HbA1c) were collected through structured interviews and laboratory testing. Diagnosis of DM followed American Diabetes Association criteria. Anthropometric measurements, including body mass index (BMI) and waist-to-hip ratio (WHR), were recorded using standardized procedures. Data were analyzed using SPSS version 23.0, employing descriptive statistics to estimate prevalence and characterize clinical features Results: A total of 51 cholelithiasis patients were included, with a mean age of 43.0 ± 12.0 years; 53% were female. Overweight and obesity were prevalent in 47% and 18% of patients, respectively. Diabetes mellitus was present in 37.3% of cases, more common among females. Based on fasting glucose levels, 35.3% had overt diabetes, 21.6% had pre-diabetes, and 43.1% had normal levels. HbA1c analysis revealed 35.3% had uncontrolled or poorly controlled diabetes. These findings highlight a notable burden of diabetes and metabolic risk factors among gallstone patients. Conclusion: The study demonstrates a notable frequency of diabetes mellitus among patients with gallstones, emphasizing the need for routine diabetes screening and integrated management to reduce compl