Breast cancer is a group of malignant disease that commonly occurs in the female breast and infrequently in the male breast. About 25-30% of breast cancer cases are detected among women below 40 years. The average age recognized nationally is 41 to 50 years. At least 10 to 11 percent of cases of cancer in women in Himachal Pradesh are breast cancer.  The objectives of the study were to assess level of awareness and practices followed by women to prevent breast cancer, to associate the awareness score with selected demographic variables and to correlate the awareness score with practices followed by women to prevent breast cancer. METHODS: Quantitative descriptive study was carried out in selected villages of District Sirmour, HP. Using non-probability convenience sampling, 200 women between the age group of 25-40 years were selected from selected areas. Subjects were interviewed using structured questionnaire regarding the prevention of breast cancer and practices followed to prevent breast cancer. Data was analysed by using SPSS version 15 in terms of descriptive and inferential statistics. RESULTS: The result shows more than half (57.5% ) of the samples  were having moderate awareness about prevention of breast cancer and only 8.0% were having good awareness whereas 34.5% were not having any awareness about prevention of breast cancer. The Mean score of awareness was 7 with a standard deviation of 2.745. Only 10.5% samples were following good practices for the prevention of breast cancer whereas 81.5% were following moderate practices and only 16(8.0%) were having poor practices about the prevention of breast cancer. There was association between awareness and variables( education, occupation and parity) and no correlation was found in between awareness and practices about prevention of breast cancer CONCLUSION: In conclusion, Intensive educational campaigns to tackle the observed educational deficits should be planned in order to raise awareness towards breast cancer, its risk factors with emphasis on role of prevention and guidelines for screening through self -breast examination, clinical breast examination and mammography.