A-H
- Acton Institute
- Africa Center for Strategic Studies
- Al-Shabaka, The Palestinian Policy Network
- American Action Forum
- American Council for Capital Formation
- American Enterprise Institute
- American Foreign Policy Council
- American Legislative Exchange Council
- American Press Institute
- Arab American Institute
- Arab Gulf States Institute in Washington
- Arctic Institute
- Ash Center for Democratic Governance & Innovation -HKS
- Asia Society Policy Institute
- Aspen Institute
- Association for Public Policy Analysis and Management
- Atlantic Council
- Atlas Network
- Baker Institute
- Beacon Hill Institute
- Belfer Center for Science & International Affairs - HKS
- Berggruen Institute
- Bipartisan Policy Center
- Bloomberg Harvard City Leadership Initiative - Harvard
- Breakthrough Institute
- Brennan Center for Justice
- BRIE - The Berkeley Roundtable on the International Economy
- Brookings Institution
- Campaign Finance Institute
- Carnegie Council for Ethics in International Affairs
- Carnegie Endowment for International Peace
- Carr Center for Human Rights Policy - HKS
- Carter Center
- Cascade Policy Institute
- Cato Institute
- Center for a New American Security
- Center for American Progress
- Center for American Women and Politics
- Center for an Urban Future
- Center for Army Lessons Learned
- Center for Climate and Energy Solutions
- Center for Climate and Security
- Center for Comparative Immigration Studies
- Center for Congressional and Presidential Studies
- Center for Democracy and Technology
- Center for Digital Government
- Center for Disease Dynamics, Economics & Policy
- Center for Economic Policy and Research
- Center for Education Policy Studies
- Center for Education Policy Research
- Center for Effective Government
- Center for European Policy Analysis
- Center for Financial Inclusion
- Center for Global Development
- Center for Governmental Studies
- Center for Health Decision Science
- Center for Housing Policy
- Center for Infectious Disease Research and Policy
- Center for Information & Research on Civic Learning and Engagement
- Center for Information Policy Research
- Center for International and Security Studies at Maryland
- Center for International Development - HKS
- Center for International Earth Science Information Network
- Center for International Policy
- Center for International Private Enterprise
- Center for International Security and Arms Control
- Center for International Trade and Security
- Center for Journalism Ethics
- Center for Law and Social Policy
- Center for Migration Studies
- Center for National Policy
- Center for Naval Analysis
- Center for New American Security
- Center for Policing Equity
- Center for Progressive Reform
- Center for Public Integrity
- Center for Public Leadership - HKS
- Center for Public Policy & Administration
- Center for Public Policy Priorities
- Center for Reproductive Rights
- Center for Responsive Politics
- Center for Retirement Research
- Center for Security and Emerging Technology
- Center for Security Policy
- Center for State Health Policy
- Center for Strategic and Budgetary Assessments
- Center for Strategic and International Studies
- Center for Technology & Government
- Center for the National Interest
- Center for the Study of the Presidency and Congress
- Center for Transatlantic Relations
- Center for Voting and Democracy
- Center on Budget and Policy Priorities
- Center on Global Energy Policy
- Center on Public Diplomacy
- Century Foundation
- CFA Institute
- Chicago Council on Global Affairs
- Christensen Institute
- City Mayors Foundation
- Coalition for Environmentally Responsible Economies
- Committee for Economic Development
- Commonwealth Fund
- Commonwealth Institute
- Community Advocates Public Policy Institute
- Competitive Enterprise Institute
- Congressional Research Service
- Council on Foreign Relations
- Dart Center for Journalism and Trauma
- Data & Society Institute
- Data-Pop Alliance
- Data-Smart City Solutions - HKS
- Demos
- Eagleton Institute of Politics
- Earth Institute
- East- West Center
- EastWest Institute
- Economic Innovation Group
- Economic Policy Institute
- Edmund J. Safra Foundation Center for Ethics - HKS
- Electronic Privacy Information Center
- Employee Benefit Research Institute
- Employment Policies Institute
- Eno Center for Transportation
- Environmental and Energy Study Institute
- Environmental Law Institute
- Ethics + Emerging Sciences Group
- Ethics and Public Policy Center
- Families and Work Institute
- Feinstein International Center
- Food Research & Action Center
- Foreign Policy Research Institute
- Foundation for Economic Education
- Free Expression Policy Project
- Freedom Forum
- Freedom House
- FutureEd
- Gates Institute for Population and Reproductive Health
- George C. Marshall Institute
- Georgetown Center for Poverty and Inequality
- Georgetown Institute for Women, Peace and Security
- German Marshall Fund
- Global Development and Environment Institute
- Global Institute of Sustainability
- Global Integrity
- Goldwater Institute
- Government Innovations Network - HKS
- Guttmacher Institute
- Harvard Global Health Initiative -Harvard
- Harvard Humanitarian Initiative - Harvard
- Heartland Institute
- Henry L. Stimson Center
- Heritage Foundation
- Hispanic American Center for Economic Research
- Hoover Institution on War, Revolution, and Peace
- Hubert H. Humphrey Institute of Public Affairs
- Hudson Institute
- Human Rights First
- Human Rights Watch
I-Z
- ICA Institute
- Independent Institute
- Information Technology & Innovation Foundation
- Institute for Agriculture & Trade Policy
- Institute for Defense Analysis
- Institute for Energy and Environment Research
- Institute for Ethics & Emerging Technologies
- Institute for Global Ethics
- Institute for Health Metrics and Evaluation
- Institute for Higher Education Policy
- Institute for Local Self-Reliance
- Institute for National Strategic Studies
- Institute for New Economic Thinking
- Institute for Peace
- Institute for Philosophy and Public Policy
- Institute for Policy Research
- Institute for Policy Studies
- Institute for Public & International Affairs
- Institute for Public Diplomacy & Global Communication
- Institute for Religion And Democracy
- Institute for Research on Labor and Employment (IRLE)
- Institute for Research on Poverty
- Institute for Science & International Security
- Institute for Social and Environmental Transition-International
- Institute for Social Research
- Institute for the Analysis of Global Security
- Institute for the Study of Diplomacy
- Institute for Transportation & Development Policy
- Institute for Women's Policy Research
- Institute of Politics - HKS
- Institution for Social and Policy Studies
- Inter-American Dialogue
- International Center for Research on Women
- International Food Policy Research Institute
- International Forum for Peace Operations
- International Institute for Strategic Studies
- International Peace Institute
- Jamestown Foundation
- John Locke Foundation
- Joint Center for Housing Studies - HKS
- Joint Center for Political & Economic Studies
- Kaiser Family Foundation
- Kaiser Permanente Institute for Health Policy
- Levy Economics Institute
- Lexington Institute
- Lincoln Institute of Land Policy
- Lincy Institute
- Lugar Center
- Mackinac Center
- Maine Center for Economic Policy
- Manhattan Institute for Policy Research
- Maryland Institute for Policy Analysis and Research
- Massachusetts Budget and Policy Center
- Massachusetts Institute for a New Commonwealth
- Mathematica Policy Research
- Maureen and Mike Mansfield Foundation
- McCain Institute for International Leadership
- MDRC
- Mercatus Center
- Middle East Institute
- Middle East Media Research Institute
- Migration Policy Institute
- Milken Institute
- Morrison Institute for Public Policy
- Mossaver-Rahmani Center for Business & Government - HKS
- National Academy of Public Administration
- National Bureau of Economic Research
- National Center for Children in Poverty
- National Center for Policy Analysis
- National Center for Smart Growth Research & Education
- National Center for State Courts
- National Cybersecurity Center of Excellence
- National Foundation for American Politics
- National Health Policy Forum
- Natural Resource Governance Institute
- Nautilus Institute for Security & Sustainable Development
- Neiman Journalism Lab
- Nelson A. Rockefeller Institute of Government
- New America Foundation
- Nicholas Institute for Environmental Policy Solutions
- Nonproliferation Policy Education Center
- NORC at the University of Chicago
- Northeast-Midwest Institute
- Oakland Institute
- Olin Center for Law, Economics and Business- Harvard
- Open Society Foundations
- Pacific Forum
- Pacific Research Institute
- Partnership for Public Service
- Peterson Institute For International Economics
- Pew Charitable Trusts
- Pew Research Center
- Pew Research Journalism Project
- Phoenix Center for Advanced Legal & Economic Public Policy Studies
- Pinchot Institute for Conservation
- Pioneer Institute for Public Policy Research
- Policy Matters Ohio
- Political Research Associates
- Potomac Institute for Policy Studies
- Prison Policy Initiative
- Progressive Policy Institute
- Project for The Study of the 21st Century
- Project on Defense Alternatives
- Project on Government Oversight
- Property and Environment Research Center
- Public Agenda
- Public Policy Institute of California
- Public Policy Institute of New York State
- Public Policy Research Center
- Quincy Institute for Responsible Statecraft
- Rand Corporation
- Rappaport Institute for Greater Boston - HKS
- Reason Foundation
- Resolution Foundation
- Resources for the Future
- Rockefeller Institute of Government
- Roosevelt Institute
- Rural Policy Research Institute
- Santa Fe Institute
- Schuster Institute for Investigative Journalism
- Sentencing Project
- Shorenstein Center on Media, Politics, and Public Policy - HKS
- Social Science Research Council
- Southern Poverty Law Center
- SPUR
- Stimson Center
- Strategic Studies Institute
- Taubman Center for State & Local Government - HKS
- Tax Foundation
- Tribal Law and Policy Institute
- Third Way
- Tow Center for Digital Journalism
- TRAC: Transactional Records Access Clearinghouse
- Transparency International - USA
- Transportation for America
- Transportation Research Board
- Truman National Security Project
- U.S.-Korea Institute at SAIS
- UA Institute of Social & Economic Research
- UCLA Center for Internet Inquiry
- United States Institute of Peace
- Urban Institute
- Vera Institute of Justice
- W.E. Upjohn Institute
- Washington Center for Equitable Growth
- Washington Institute for Near East Policy
- Weatherhead East Asian Institute
- Weidenbaum Center on the Economy, Government, & Public Policy
- Wiener Center for Social Policy - HKS
- Wilder School's Center for Public Policy
- Williams Institute
- Wilson Center
- Women & Public Policy Program - HKS
- Women's Environment & Development Organization
- World Peace Foundation
- World Resources Institute