Intoduction: Having knowledge on the edentoulism pattern would assist us in the theoretical and practival educational planning and in this regard, we could come to a better conclusion on society’s immense issues related to the health, prevention, and treatment. Objectives: This study intended to evaluate the prevalence of different classes of removable partial prosthesis based on Kenedy’s classification in dental prosthesis, in Tabriz Faculty of Dentistry. Materials and methods: Two-hundred fourty four patients were randomly selected and went under removable oartial prosthesis therapy. Patients’ information was recorded at pre-prepared forms. The collected data were analyzed either independently or as dependant on the age, gender, and educational level variable using SPSS version 16.0. The level of significance was considered P<0.05in this study. Results: In all treated patients, class I partial prosthesis was the most prevelant class (40.6%) and class II mod IV were the least ones (0.4%). Pearson correlation test displayed that there is no significant association between the classification of partial prosthesis and the age, gender, and educational level variables (P>0.05). Conclusions: Based on the findings of this study, class I removable partial prosthesis was the most prevalent treated prosthesis among all groups regarding the age, gender, and educational level.