Contrary to most international research findings and similar to the previous Sri Lankan study, no significant association was found between breast density and breast cancer. Additionally, out of multiple factors, only age, menopausal state and BMI were found to be significantly associated with breast density. Conclusion :These findings may indicate that there is a true difference in the Sri Lankan population form the previously studied international populations suggesting that there is no association between breast density and breast cancer in Sri Lankan women. A further multicenter research is necessary to prove or disprove this theory.