Leadership is a fundamental component and core competency of nursing practice. This chapter describes four key leadership theories that are particularly applicable to nursing, meaningful in today's organizational environments, and can remain relevant throughout the constantly evolving landscape of healthcare. Transformational leadership focuses on producing revolutionary change through a commitment to the organization's vision. Servant leadership are servants above all else. They put serving others, including employees, customers, and community, as the number one priority. Situational leadership theory examines the interplay of three specific dimensions: task behavior, relationship behavior, and the readiness of the follower. Authentic leadership refers to developing a personal leadership style that is consistent with one's own personality and character. The chapter discusses a leadership self-assessment tool that can be used to identify leadership strengths in addition to areas with room for growth. Finally, it differentiates leadership and management.