Osteoporosis is a global health problem both in the developed and developing countries. Patient education forms an important part in the management of osteoporosis. The objective of this study was to evaluate knowledge about osteoporosis and its correlates among women aged ≥ 40 years attending an urban health centre in India and to identify their sources of information on osteoporosis. Knowledge about osteoporosis was assessed using the Osteoporosis Questionnaire (OPQ) in 243 women over 40 years of age, attending an urban health centre in the city of Mumbai located in the state of Maharashtra in western India. This exploratory cross-sectional study was conducted over a period of eight months. The OPQ analysis was performed using SPSS for Windows Version 13.0. The scores were expressed as mean ± SD (Standard Deviation). The one sample-t test was used to study the differences in the mean scores between socio-demographic variables. The mean total OPQ score was 0.91 (SD ± 5; range -9 to 10; maximum possible score 20). There was a significant difference in the total OPQ scores by the level of education and family history of osteoporosis (p