Diabetes mellitus is a group of metabolic diseases leading to high levels of blood glucose due to insufficient insulin in the body. Uncontrolled diabetes mellitus may pose a medical emergency during dental procedures and modifications in the treatment plan may be required during dental and oral surgical procedures according to the patient’s diabetic status. The aim of this study was to evaluate the prevalence of diabetes mellitus among patients undergoing dental extractions at Saveetha Dental college and hospitals. In this retrospective crosssectional study, digital case records of all patients who underwent extractions in Saveetha dental college and hospital from June 2019 to March 2020 were reviewed. Demographic details of patients and diabetes mellitus status were recorded from digital case records. Retrieved data was analysed using IBM SPSS Software Version 23.0. Descriptive statistics and tests of association of categorical variables by Chi square tests were done and results were obtained. Among 6682 patients who underwent dental extractions, 906 patients (13%) had diabetes mellitus. The prevalence of diabetes mellitus among extraction patients was more in the age group of 39-48 years (39.2%). The proportion of extraction patients with diabetes mellitus was more in males (57.1%) than females (42.9%). The association between age and diabetes mellitus were statistically significant (p<0.001). Association between the gender and diabetes mellitus were statistically not significant (p=0.064). Within the limits of the study, the prevalence rate of diabetes mellitus among dental patients undergoing extractions was 13%. Diabetes mellitus was predominantly seen in the age group of 39-48 years with male predilection.