The aim of this study was to determine the frequency and distribution of mandibular teeth treated by single visit root canal treatment (RCT) and multi-visit RCT in a group of the Indian population. With the approval of the Institutional Review Board of Saveetha Dental college, the data of 3887 patients between June 2019 to March 2020 were retrieved and analysed. Data was collected from 3887 patients and were divided into the criteria of a single visit and multi-visit RCT. The data were tabulated into excel sheets under the headings age, gender, teeth, type of treatment. It was an Institutional based Retrospective study. It was observed that there was a statistically significant association in the age and gender of patients who underwent single visit and multi-visit RCT in mandibular teeth. The probability value P<0.05 was obtained after performing a Chi-square test, showing that multi-visit RCT cases (59.9%)were higher than single visit RCT (40.56%). Within the limitations of the study, it was concluded that the frequency of multi-visit RCT was higher in mandibular teeth compared to single visit RCT. Frequency of multi-visit RCT was higher in mandibular molars followed by second premolars in comparison to single visit RCT. The frequency of multi-visit RCT was higher in both males and females compared to single visit RCT.