Organizational configurations are sets of firms that are similar in terms of important characteristics. This article is intended to help close three gaps in the literature on organizational configurations. First, the authors propose clear definitions that may facilitate progress in the literature. Second, they provide the first major review since 1993 of accomplishments and struggles within organizational configurations research. Third, they describe how the configurational approach to organizations can make greater contributions within its traditional domains of organization theory and strategic management and can be extended to inform areas such as human resource management, organizational behavior, ethics, entrepreneurship, and international business.