Sponsorship describes a set of actions wherein an influential champion (sponsor) uses their position to actively support a colleague’s career by helping them gain visibility, recognition, and/or positions. There is growing awareness of the importance of sponsorship for career advancement in academic medicine, particularly for women and those who are historically underrepresented and excluded in medicine (UIM). This scoping review examines the current landscape of evidence, and knowledge gaps, on sponsorship as it relates to career advancement in academic medicine for women and UIM faculty. We searched peer-reviewed literature in PubMed, Embase, and Web of Science (WoS) over the past 50 years (from 1973 through July 2023). Sixteen studies were included in the final review. We found relative consensus on sponsorship definition and value to career advancement. Heterogeneity in study design limited our ability to directly compare study outcomes. All included studies focused on gender differences in sponsorship: two of four quantitative studies found men were more likely to receive sponsorship, one reported no gender differences, and one was insufficiently powered. All but one of the qualitative studies reported gender differences, with women less likely to access or be identified for sponsorship. The mixed-methods studies suggested sponsorship may vary by career stage. Only two studies analyzed sponsorship for UIM populations. The existing data are inconclusive regarding best ways to measure and assess sponsorship, what institutional support (e.g., structured programs, formal recognition, or incentives for sponsorship) should look like, and at what career stage sponsorship is most important. Addressing this knowledge gap will be critically important for understanding what sponsorship best practices, if any, should be used to promote equity in career advancement in academic medicine. We advocate for commitment at the institutional and national levels to develop new infrastructure for transparently and equitably supporting women and UIM in career advancement.