The ability to be a leader and advocate are essential for every counselor. The purpose of this chapter is to build upon previous chapters by offering theory, research, and application of leadership and advocacy in P-12 schools and universities. We discuss how counseling leadership and advocacy within these two settings are unique and how counselors working in schools and universities can infuse leadership and advocacy within their roles. Additionally, we identify critical examples of how school counselors and college counselors and student affairs professionals can be leaders and advocates related to these topics. Finally, we present a special focus on crisis and disaster related to leadership and advocacy in schools and universities.