This article introduces the background and need for this special issue of the Consulting Psychology Journal: Practice and Research on “Defining and Measuring Character in Leadership.” The introduction reviews some of the history of the concept of character in leadership, presents the major themes of the special issue, and briefly describes the 6 papers related to 3 models of character in leadership (ethical/virtuous leadership, authentic transformational leadership, and worthy leadership) and the specific elements of integrity, ethics, virtues, and moral potency. The introduction notes that each article in the special issue indicates how character in leadership can be defined, operationalized, and assessed. The implications of each model for the practice of consulting psychology are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)