The Washington Information Directory is the essential one-stop source for information on U.S. governmental and nongovernmental agencies and organizations. This thoroughly researched guide provides capsule descriptions that help users quickly and easily find the right person at the right organization. The Washington Information Directory offers three easy ways to find information: by name, by organization, and through detailed subject indexes. Although it is a "directory, the volume is topically organized, and within the taxonomic structure the relevant organizations are listed not only with contact information but with a brief paragraph describing what the organization (whether government or nongovernmental) does related to that topic. It is focused on Washington--in order to be listed, an organization must have an office in the Washington metropolitan area. These descriptions are not boilerplate advertising material from the organizations; rather, they are hand-crafted by a talented freelance research team. In addition, the Washington Information Directory pulls together 55 organization charts for federal agencies, congressional resources related to each chapter topic, hotline and contact information for various specific areas of interest (from Food Safety Resources to internships in Washington), and an extensive list of active congressional caucuses and contact details. It has two appendices, one with thorough information on congresspersons and committees, and the second with governors and embassies.

With more than 10,000 listing and coverage of the new presidential administration, the 2019-2020 Edition features contact information for the following:

- 116th Congress and federal agencies
- Nongovernmental organizations
- Policy groups, foundations, and institutions
- Governors and other state officials
- U.S. ambassadors and foreign diplomats
- Congressional caucuses