Background: Diabetes mellitus is an important public health matter worldwide. It is a set of metabolic disorders that lead to elevated blood sugar levels for a long span. Materials and methods: This is a retrospective study implemented at the diabetic center of Shahat City. It studied all enrolled cases from September 2013 to the end of 2023, and all information was obtained about age, gender, age at the start of the disease, and other personal information about cases, in addition to whether the patient was type 1 or 2 from records of the center. The subjects of the study were all the patients who registered in the Diabetic Shahat Center the study was conducted in 2024. 2713 out of 3778 whose complete data were included and those incompletes were excluded. Results: The study showed diabetes in Shahat City distribution of diabetic patients, with 56.6% females and the highest age range being 41-60. Most cases were type 2 diabetic patients (90%). Conclusions: In terms of gender, there were slightly more females than males. In addition, this study proved that age is an important determinant in the occurrence of DM and increases the likelihood of getting DM with increased age........... Keywords: .......Diabetes mellitus, insulin, Shahat City, Libya.