U.S. Think Tanks by Ideology

Conservative

• American Enterprise Institute
• Center for Immigration Studies
• Center for Security Policy
• Claremont Institute
• Committee on the Present Danger
• Foreign Policy Research Institute
• Heritage Foundation
• Hoover Institution for War, Revolution, and Peace
• Hudson Institute
• Manhattan Institute
• Middle East Forum
• National Center for Policy Analysis
• Pacific Research Institute
• Project for the New American Century

Liberal

• Center on Budget and Policy Priorities
• Center for American Progress
• Center for Economic and Policy Research
• Center for Progressive Reform
• Economic Policy Institute
• Institute for Policy Studies
• Phoenix Group
• Rockridge Institute
• Public Citizen
• The Roosevelt Institution

Centrist

• Aspen Institute
• Atlantic Council of the United States
• Brookings Institution
• Carnegie Endowment for International Peace
• Center for Strategic and International Studies
• Council on Foreign Relations
• Committee for Economic Development
• Information Technology and Innovation Foundation
• New America Foundation
• Progressive Policy Institute
• Resources for the Future
• Henry L. Stimson Center
• RAND
• Urban Institute
• Woodrow Wilson International Center for Scholars

Libertarian

• Ayn Rand Institute
• Atlas Economic Research Foundation
• Cascade Policy Institute
• Cato Institute
• Competitive Enterprise Institute
• Foundation for Economic Education
• Goldwater Institute
• Heartland Institute
• Independent Institute
• Mackinac Center for Public Policy
• Mercatus Center
• Mises Institute
• Reason Foundation
• Show-Me Institute