Objectives: Osteoporosis is a crucial health concern, common in older people regardless of their gender. Improving knowledge about osteoporosis raises awareness among older adults. The aims of this study were to assess the older adults knowledge and beliefs about osteoporosis based on their socio-demographic characteristics; and, to examine the effectiveness of the educational program on their knowledge and health beliefs. Design: Quasi-experimental research design was used. Methods: The study utilized a one-group pretest-posttest design with a convenience sample of 200 older adults, 75.5% of them were females. Data were collected using Osteoporosis Knowledge Test scale (OKT) and Osteoporosis Health Belief Scale (OHBS). Results: The findings showed that there was significant increase in knowledge scores after the implementation of the educational program. Furthermore, there was a benefit of calcium intake and significant difference in regard to participants gender, and level of education. Discussion: The intervention of our study has led to an increase in knowledge about osteoporosis among the studied older adults after the program. This result is consistent with many other studies on the education and exercise programs to improve osteoporosis knowledge of older adults. Conclusion: The educational program has positively affected the older adults patients knowledge, attitude, and belief in the prevention and treatment of osteoporosis.