Background: Periodontitis is an inflammatory disease of the supporting tissues of the teeth caused by specific microorganisms or groups of specific microorganisms, resulting in progressive destruction of periodontal tissues. The two main entities are chronic periodontitis and aggressive periodontitis. Hence; the present study was conducted for assessing risk factors of chronic and aggressive periodontitis in a known population. Materials & methods: Samples size of the present study was 200 and was as follows: Chronic periodontitis patients: 100 patients, and Aggressive periodontitis patients: 100 patients Complete demographic and clinical data of all the patients was obtained. Clinical examination of all the patients was carried out and detailed clinical and past medical history was obtained. A questionnaire was obtained and was given to all the subjects. Questionnaire contained detailed information pertaining to risk factors of periodontitis. All the results were recorded in Microsoft excel sheet and were analyzed by SPSS software. Results: Significant results were obtained while comparing the mean age of the patients of both the study groups. Majority of the patients of the aggressive periodontitis group were students while majority of the patients of the chronic periodontitis group were employed subjects. Significantly higher proportion of patients of chronic periodontitis group were smokers where is significantly higher proportion of patients of aggressive periodontitis group were non-smokers. Conclusion: Aggressive periodontitis manifests mainly in younger population whereas aged individuals are more susceptible for chronic periodontitis. Key words: Chronic, Aggressive, Periodontitis