LIst of Conservative & Liberal Think Tanks

United States
See also List of think tanks in the United States organized with liberal, conservative, libertarian and centrist categories.

Acton Institute
Alexis de Tocqueville Institution
Allegheny Institute for Public Policy
American Civil Rights Union
American Consumer Institute
American Enterprise Institute
American Foreign Policy Council
American Institute for Contemporary German Studies
American Institute for Economic Research
American Iranian Council
American Israel Public Affairs Committee
Analysis Group
Askew Institute on Politics and Society
Aspen Institute
Atlantic Council of the United States
Atlas Economic Research Foundation
Battelle Memorial Institute
Bradley Foundation
Brookings Institution
Carnegie Endowment for International Peace
Cascade Policy Institute
Cato Institute
Center for American Progress
Center for an Urban Future
Center for Economic and Policy Research
Center for Ethical Solutions
Center for Global Development
Center for Governmental Studies
Center for Immigration Studies
Center for International Policy
Center for Media and Democracy
Center for Public Integrity
The Center for Public Justice
Center for Progressive Reform
Center for Security Policy
Center for Strategic and Budgetary Assessments
Center for Strategic and International Studies
Center for the Advancement of Capitalism
Center on Budget and Policy Priorities
Center on International Cooperation
Claremont Institute
Committee for Economic Development
Committee on the Present Danger
Competitive Enterprise Institute
Constitution Project
Corporation for Enterprise Development
Council of Twelve
Council on Foreign Relations
Demos
Discovery Institute
Economic Opportunity Institute
Economic Policy Institute
Economic Research Institute
Employment Policies Institute
The Edward Bruwer-Lytton Institute
Freund Scholarly Research Group
Foreign Policy Research Institute
Foundation for Economic Education
Foundation for Excellence in Education
Foundation for Rational Economics and Education
Fusion Energy Foundation
General Electric EdgeLab
Global Development and Environment Institute
Global Financial Integrity
Global Trade Watch
Goldwater Institute
Heartland Institute
Henry L. Stimson Center
Heritage Foundation
Hoover Institution
Hudson Institute
India, China & America Institute
Independent Institute
Information Policy Institute
Information Technology and Innovation Foundation
Institute for Analysis of Global Security
Institute for Collaborative Engagement
Institute for Policy Innovation
Institute for Policy Studies
Inter-American Economic Council
International Center for Research on Women
ISA (International Strategic Analysis)
James Madison Institute
Jamestown Foundation
John S. Watson Institute for Public Policy
Joint Center for Political and Economic Studies
Justice Research Association
Keck Institute for Space Studies
Korea Policy Institute
Ludwig von Mises Institute
Mackinac Center for Public Policy
Manhattan Institute
Mayfield 15 Policy Research Institute
Mercatus Center at George Mason University
Middle East Forum
Migration Policy Institute
Milken Institute
MITRE
National Bureau of Asian Research
National Center for Policy Analysis
National Endowment for Democracy
New America Foundation
New Democrat Network
New England Complex Systems Institute (NECSI)
New Teacher Center
Pacific Institute
Pacific Research Institute
Peterson Institute
Phoenix Group
Pioneer Institute
Policy Matters Ohio
Political and Economic Research Council (PERC)
Potomac Institute for Policy Studies
Progress and Freedom Foundation
Progressive Policy Institute
Project for the New American Century
Public Citizen
RAND Corporation
Reason Foundation
Rebirth of Freedom Foundation
Reform Institute
Research Triangle Institute
Resources for the Future
Ripon Society
Rockridge Institute
Rocky Mountain Institute
Roosevelt Institution
Santa Fe Institute
Show-Me Institute
Stanley Foundation
State Policy Network
Strategic Studies Institute
Streit Council for a Union of Democracies
Tax Foundation
Tellus Institute
Urban Institute
U.S. Institute of Peace
Washington Institute for Near East Policy
W.E. Upjohn Institute for Employment Research
WestEd
Woodrow Wilson International Center for Scholars
World Policy Institute
Xerox PARC