Abstract Modern policing in the United States is best conceived as a joint undertaking between public and private sectors. Over the last several decades there has been a gradual movement away from monopolistic state provision of police services toward a greater reliance on the private sector for protection and security. While the current activities of public and private police are well chronicled in the research literature, little is actually known about the coordination of policing activities across sectors. The purpose of this article is to describe the range of public-private police partnerships that have developed recently in the United States.