Hispanic-Serving Institutions (HSIs) are degree-granting, not-for-profit colleges and universities that enroll at least 25% full-time equivalent enrollment of undergraduate Hispanic students, making them eligible for competitive federal funding. They are one of seven enrollment-based Minority Serving Institutions (MSIs) that came to enroll racially and ethnically diverse students over time, but they lack a historic mission and organizational identity to serve these students. This reality has prompted scholars to question if HSIs are Latine-enrolling or Latine-serving. But what does it mean to become Latine-serving? This is both an organizational identity and organizational change question, which are interrelated yet distinct processes. This chapter provides an overview and critique of organizational identity research conducted across disciplines including organization studies, management, sociology, and higher education and reviews the research on HSI organizational identity. It also reviews student development theory and explores the ways this body of research can inform organizational identity development. Through this review, organizational identity development is theorized as being influenced by internal processes of change and external isomorphic influences as illustrated in the Model of Multiple Dimensions of [Organizational] Identity (MMD(O)I). With 600 colleges and universities now eligible for the HSI designation, the need for a collective HSI identity is pressing.