In this descriptive cross-sectional study, we examined awareness of breast cancer among Indonesian women at moderate-to high-risk of developing breast cancer. Data were obtained from 87 eligible participants using the Modified Breast Cancer Awareness Measure. The International Breast Cancer Intervention Study model was used to identify women at moderate-to-high risk of developing breast cancer. The data were analyzed using descriptive statistics. The results showed that none of the participants had knowledge of age-related risk (0%). Other domains that indicated low awareness were knowledge of lifetime risk (31%), followed by knowledge of risk factors, in particular the item regarding menstruation at an early age (12.6%). These results indicated that increasing awareness of breast cancer risks is highly needed, in particular among women at moderate-to-high risk of developing breast cancer in Indonesia.