Background: Knee osteoarthritis (KOA) accounts for nearly four-fifths of osteoarthritis (OA) worldwide and increases with obesity and age1Osteoarthritis (OA) is one of the most common causes of pain and disability, representing a significant burden for the individual and for society Methods: A community based cross sectional study was conducted to find out the prevalence of Knee Osteoarthritis among rural population of age group above 40 years and also to find out the association between risk factors and prevalence of Knee OA with the sample of 370 by simple random sampling Result: The prevalence of knee osteoarthritis was found to be 31.6% in our study The prevalence was found to be highest in the age group70 and above. The prevalence of knee OA in females was more than the males. The lifestyle risk factor like DM and BMI ≥25 was found to be significantly associated with knee OA. (p <0.05). Conclusion:The prevalence of knee osteoarthritis was found to be highest among elderly (>70) population, more common in females, significantly associated with obesity.