List of think tanks in the United States

This is a list of think tanks in the United States.

International relations and security

 * 38 North
 * American Foreign Policy Council
 * American Israel Public Affairs Committee
 * American Security Council Foundation
 * American Security Project
 * American–Iranian Council
 * Arctic Institute
 * Asia Society
 * Aspen Institute
 * Atlantic Council
 * Belfer Center for Science and International Affairs
 * Carnegie Council for Ethics in International Affairs
 * Carnegie Endowment for International Peace
 * Carter Center
 * Center for a New American Security
 * Center for Advanced Defense Studies
 * Center for Global Development
 * Center for International Development
 * Center for International Policy
 * Center for International Security and Cooperation
 * Center for Naval Analysis
 * Center for Security and Emerging Technology
 * Center for Security Policy
 * Center for Strategic and International Studies
 * Center for the National Interest (The Nixon Center)
 * Center for Transatlantic Relations
 * Center on Global Interests
 * Chicago Council on Global Affairs
 * Committee on the Present Danger
 * Council on Foreign Relations
 * Council on Hemispheric Affairs
 * Defense Priorities
 * East-West Center
 * EastWest Institute
 * Foreign Policy Research Institute
 * Foundation for Defense of Democracies
 * Gatestone Institute
 * German Marshall Fund of the United States
 * Global Trade Watch
 * GlobalSecurity.org
 * Henry L. Stimson Center
 * Institute for Defense Analyses
 * Institute for Science and International Security
 * Inter-American Dialogue
 * International Crisis Group
 * Islands Society
 * Israel Policy Forum
 * J Street
 * Jewish Institute for National Security Affairs
 * Middle East Forum
 * Middle East Institute
 * National Committee on American Foreign Policy
 * National Security Network
 * Open Society Foundations
 * Pacific Council on International Policy
 * Pacific Forum CSIS
 * Peterson Institute for International Economics
 * Project 2049 Institute
 * Project for the New American Century
 * RTI International
 * Sikh Coalition
 * Special Competitive Studies Project
 * Strategic Studies Institute
 * Streit Council for a Union of Democracies
 * Tellus Institute
 * Jamestown Foundation
 * The Stimson Center
 * Truman National Security Project
 * United States Institute of Peace
 * Washington Institute for Near East Policy
 * Woodrow Wilson International Center for Scholars
 * World Affairs Council
 * World Resources Institute

Environment, science and technology

 * Battelle Memorial Institute
 * Center for Climate and Energy Solutions
 * Center for Ethical Solutions
 * Copenhagen Consensus Center
 * Discovery Institute
 * Earth Institute
 * Fusion Energy Foundation
 * General Electric EdgeLab
 * Global Development and Environment Institute
 * GTRI Office of Policy Analysis and Research
 * Hastings Center
 * Information Technology and Innovation Foundation
 * Keck Institute for Space Studies
 * Metropolitan Area Planning Council
 * New England Complex Systems Institute
 * Noblis
 * Pacific Institute
 * Property and Environment Research Center
 * Resources for the Future
 * RTI International (Research Triangle Institute)
 * Santa Fe Institute
 * Scripps Research Institute
 * Watson Institute at Brown University
 * Institute for Progress

Arts and humanities

 * Americans for the Arts
 * Catholic Family and Human Rights Institute
 * Center for Excellence in Higher Education
 * Center for Muslim-Jewish Engagement
 * Foundation for Excellence in Education
 * Foundation for Rational Economics and Education
 * International Center for Research on Women
 * International Intellectual Property Institute
 * New Teacher Center
 * Urban Land Institute
 * WestEd