The New Zealand Institute
- A privately funded think-tank that is committed to generating new and creative debate, ideas, and solutions that contribute to building a better and more prosperous New Zealand for all New Zealanders.
- http://nzinstitute.org

Nelson A. Rockefeller Institute of Government
- The institute is the public policy research arm of the State University of New York. It is actively involved in public policy research on the role of state and local governments in American federalism and the management and finances of states and localiti
- http://www.rockinst.org/

National Institute for Labor Relations Research
- The Institute provides the supplementary analysis and research necessary to expose the inequities of compulsory unionism.
- http://www.nilrr.org

Nevada Policy Research Institute
- Nevada-based non-partisan and non-profit public policy research and education organization.
- http://www.npri.org

New Jersey Policy Perspective
- New Jersey Policy Perspective is a nonpartisan, nonprofit organization that conducts research on public policy issues in New Jersey.
- http://www.njpp.org/

The Nation Institute
- A liberal-left independently funded and administered organization, committed to a just society and the principles of the First Amendment.
- http://www.nationinstitute.org/

National Center for Policy Analysis
- A nonprofit public policy research institute.
- http://www.ncpa.org/

National Legal Foundation
- A non-profit Christian constitutional litigation firm and policy think tank committed to restoring America's Biblical foundations.
- http://www.nlf.net/

New America Foundation
- Attempts to bring new voices and new ideas to the fore of America's public discourse and seeks to reshape the American public debate by investing in outstanding individuals and ideas that transcend the conventional political spectrum.
- http://www.newamerica.net/

The National Center for Public Policy Research
- A conservative policy institute covering Congress, insider political information, the environment, regulations, legal reform, retirement security, Social Security, race relations, campaign reform, and affirmative action.
- http://www.nationalcenter.org/

National Social Norms Resource Center
- The National Social Norms Resource Center promotes and provides assistance in applying the social norms approach to various health, safety and social justice issues, including alcohol and tobacco risk-reduction.
- http://www.socialnorm.org

New Policy Institute
- A progressive, independent think tank, focusing on government policy for services, from health and education to finance.
- http://www.npi.org.uk

Nautilus Institute for Security and Sustainable Development
- A policy-oriented research and consulting organization. Promotes international cooperation for security and ecologically sustainable development. Programs embrace both global and regional issues, with a focus on the Asia-Pacific region.
- http://www.nautilus.org