Introduction. Breast self-examination is a noninvasive, low-cost screening method for breast cancer detection. A thorough awareness of breast self-examination enables the early detection of breast abnormalities and dramatically lowers breast cancer complications and mortality. The purpose of this study was to investigate the level of knowledge about breast self-examination and its associated factors among female students at Addis Ababa University, Ethiopia. Methods. An institution-based cross-sectional study design was employed. The final calculated sample size was 407, and participants were recruited using a proportionate stratified random sampling approach. For data entry and coding, EPI Data 3.1 statistical software was utilized, and for data analysis, SPSS version 18 was employed. The data was described using descriptive analysis. Bivariate and multivariate logistic regression analyses were performed to determine the strength of the association between the predictor and the outcome variables. A 95% confidence interval and a p-value of less than 0.05 were used to declare statistical significance. Results. The findings of this study revealed that 49.9% of respondents possessed good breast self-examination knowledge. Previously, urban residents were about two times more likely to have good knowledge of BSE than their rural counterparts (AOR =2.16, 95% CI (1.18–39.91), p =0.011). The odds of having good BSE knowledge were about three times more likely among those who had a good attitude than those who had a poor attitude (AOR =3.17, 95% CI (2.02–4.74), p <0.001). Those who knew someone with a diagnosis of breast cancer were almost three times more likely to have good knowledge than those who did not know (AOR =2.95, 95% CI (1.77-4.91), p <0.001). Conclusion. According to the findings of this survey, less than half of the students who participated had good knowledge of breast self-examination. This justifies raising awareness about breast self-examination among female students.