Purpose of Review <p>Training for residents in radiation oncology varies broadly across institutions for breast cancer treatment due to the range of treatment options with only a few published guides for training reference. Therefore, in this review, we highlight differences in breast radiation oncology training and provide recommendations to strengthen and standardize resident education.</p> Recent Findings <p>We have identified several areas that have led to a variety in training experiences within breast radiation oncology, such as increasing number of off-site staff, implementation of artificial intelligence (AI) tools, and training in adaptive radiation therapy planning and delivery.</p> Summary <p>Radiation oncology is an ever-changing field with new advances in technology and updates in standard practices. Standardization of resident training, especially in breast radiation oncology, is essential to ensure comprehensive education for future radiation oncologists that is broad and adaptable to such advances. Our recommendation includes dedicated one-on-one time to learn from medical dosimetrists and use of new technology such as AI for residents.</p>