Abstract: Osteoporosis is an abnormal condition characterized by low bone density with the risk of microfractures, especially hip fractures. Risk factors for osteoporosis include the Low Body Mass Index (BMI). This study aims to demonstrate the relationship between body mass index and bone mineral density (BMD) in 347 adult women who underwent ultrasonic bone mineral density measurement (QUS) in Palembang in 2021. The study was conducted using an observational analysis study design with a cross-sectional approach. The majority of the samples were in the normal BMI (37.2%) group, with osteoporotic BMD (48.7%). The results showed that the obese group had a higher BMD score for osteoporosis than the other groups, but there was no statistically significant relationship between BMI and BMD (p = 0.132).