Background/Aim. Osteoporosis mainly affects women in the early years following menopause. The aim of this study was to determine the level of knowledge about osteoporosis and osteoporosis related risk factors in postmenopausal women in Serbia. Methods. The study included postmenopausal women regardless if suffering from osteoporosis or not. Assessment of knowledge was carried out by using the Osteoporosis Knowledge Assessment Tool -Shorter Version (OKAT-S) questionnaire that was validated for Serbian population. Answers to the 9 questions were coded as 1 -true, or 0 -false or "do not know". Also, the following risk factors data for osteoporosis were collected: age, the onset and duration of menopause, body mass index (BMI), data on fractures, the incidence of falls, smoking, lifestyle (active, sedentary), regular sunbathing, calcium and vitamin D supplementation, intake of milk and dairy products. Results. A total of 132 postmenopausal women responded to the questionnaire with the response rate of 90.41%. Their knowledge varied from Vujasinović Stupar N, et al. Vojnosanit Pregl 2017; 74(5): 445-449.