Background– Obesity and periodontal disease are common chronic disease. This study attempts to study relationship between obesity oral bacteria and periodontal disease. Method– Study included 350 subjects with age ranging 18–60 years. They were divided into 4 groups. Clinical parameters included Plaque Index, Gingival Index, Probing Pocket Depth and Clinical Attachment Loss. Anthropometric measurements like weight, height, waist circumferences and waist–hip ratio were evaluated. Results– Comparing obesity and clinical periodontal parameters: Group–I (healthy) and Group–II (obese–I) were not statistically significant, whereas relationship between Group–1 (healthy) and Group–III (obese–II) as well as Group–1(healthy) and Group–IV (obese–III) were statistically significant . Conclusion– Adipose tissue may serve as a reservoir for inflammatory cytokines, increasing body fat has likelihood, of stimulating active host inflammatory response in periodontal disease