BackgroundrnOsteoarthirtis (OA) is the most common chronic rheumatic disorder in the world. It results in rnjoint pain, tenderness and significant disability. OA of hip and knee is very important in terms ofrnits public health significance. Significant morbidity and disability usually results from OA ofrnthese sites. Although OA is common, the radiologic and socio demographic patterns varyrnamong different studies. Information obtained from studies of the radiologic and sociorndemographic pattern of the disease in different regions can help in interventional programsrnaimed at prevention and control. It will also help as source of reference for radiologists,rnorthopedists, rheumatologists, resident and medical students. rnOBJECTIVE: rnThe objective of this study is to determine the pattern of hip and Knee OA among patientsrnbeing treated in TASH. rnMaterials and Methods:rn rnHospital based descriptive cross sectional study was conducted on 204 Hip and KneernOsteoarthritis patients in TASH to determine the pattern of hip and knee OA. Intervieweradministeredrnstructuredrnquestionerrnwasrnusedrninrndatarncollection.rnDatarnwasrncleanedrnforrnrncompletenessrnandrnthenrnenteredrnintornSPSSrnversionrn25rnmanuallyrnthenrnanalysisrnwasrndone.rnrnrnResults:rnA total of 204 patients with Hip and Knee osteoarthritis were studied. 68% of the participants rnwere female and 32% were male. Of these patients 150 had isolated knee OA and 42 hadrnisolated Hip OA and 12 had combined Hip and Knee OA.. The mean age was 54.6years. AmongrnKnee OA Obese participants were 35.2% and 43.2 were overweight. Among Hip OA Obese rnParticipants were 13% and 51.9% were overweight. There were 90 ( 80.3%) participants with rnbilateral knee disease while27 (73%)had bilateral hip disease. Obesity was more common inrnparticipants with knee than in Hip arthritis with P value - 0.046. rnConclusion: rnThe study showed that Knee OA was more common than Hip OA, and MTF compartment rninvolvement was more common followed by PTF compartment involvement. Females andrnmiddle aged were more commonly affected by OA. Majority of patients were obese andrnoverweight. Obesity is modifiable risk factor for knee OA so it can be made valid target forrnpreventing OA.