Throughout the existing literature on information sharing between public and private partnerships (PPPs), many contemporary authors define the basic premise of what specifically constitutes a public and private partnership. These partnerships exist as there is a common need among organizations to share information to prevent a wide variety of criminal activities. Specific information sharing between organizations may focus on attackers, victims, incidents, or vulnerabilities. To better understand why public–private partnerships are essential, it is imperative to assess the cyber-threat environment both public and private organization have to deal with on a daily basis. This chapter offers a current literature and contemporary sources published within the last five years on public–private partnerships in cybersecurity. The intent of this literature review was to offer both academics as well as practitioners an overview of the current state of public–private partnerships against an evolving cyber-threat environment. This chapter contains eight sections-themes found within the literature; (1) Critical infrastructure protection, (2) Legal and organizational barriers to information sharing, (3) Public Safety’s role in cybercrime and cybersecurity incidents, (4) Public sector and government roles and responsibilities, (5) International public and private initiatives, (6) Private sector, (7) The corporate and private security domain, (8) The importance of technology.