All original contents copyright 2010 & 2015, all rights reserved.
Atheist Organizations:

The Freedom from Religion Foundation - despite being run as a family business, this is the largest, most
active and most effective atheist organization in the U.S.  

The Secular Student Alliance - an impressively active association of mostly college groups.  

Atheists for Human Rights - a hard-working and sincere organization based in Minnesota, created "because
so many violations of human rights have their source in religious authoritarianism."

The Center for Inquiry - "The mission of the Center for Inquiry is to foster a secular society based on
science, reason, freedom of inquiry, and humanist values." The Center for Inquiry is the parent organization of
Committee for Skeptical Inquiry and the Council for Secular Humanism.

The Secular Coalition for America - A coalition of groups.  The "purpose in founding the coalition was to
formalize a cooperative structure for visible, unified activism to improve the civic situation of citizens with a
naturalistic worldview."

The Military Association of Atheists and Freethinkers - A community support network that connects
atheist, humanist, agnostic, freethinker, or other secular minority military members from around the world with
each other and with local organizations.

Atheist Alliance International - intended as an umbrella group of atheist organizations, "AAI's vision is to
transform society into one that supports and respects a worldview based on the values of reason, empiricism
and naturalism, and respects and protects the separation of religion and government."  

American Atheists - Founded by Madalyn Murray O'Hair in 1963, American Atheists is one of America's
oldest atheist organizations.  Although no longer at the forefront of advocacy, it remains historically interesting.

the brights - A bright is a person who has a naturalistic worldview . . .  free of supernatural and mystical
elements."  A hybrid of atheism and humanism, with a hopefully empowering new name.

Freethought Society -  formerly a local organization now expanding to national service, the goal of the
Freethought Society is to raise awareness and acceptance of the nontheist community.  Headed by Margaret
Downey, the FT Society features the valuable
Anti-Discrimination Support Network that seeks to protect
atheists from discrimination.

Center for Naturalism - "The Center for Naturalism promotes science-based naturalism as a comprehensive
worldview--a rational and fulfilling alternative to faith-based religions and other varieties of supernaturalism."

Humanist Organizations:

American Humanist Association - The largest Humanist organization in the U.S., AHA "strive[s] to bring
about a progressive society where being good without gods is an accepted way to live life. We are
accomplishing this through our defense of civil liberties and secular governance, by our outreach to the
growing number of people without traditional religious faith, and through a continued refinement and
advancement of the humanist worldview."

LGBT Humanist Council - The LGBT Humanist Council, a project of the American Humanist Association, is a
forum for LGBT humanists from across the country to exchange ideas on local organizing, find support in
coming out as LGBT (and a humanist), and to speak out with once voice on issues of concern to the
LGBT-humanist community.

Council for Secular Humanism - With more of a secular touch than the American Humanist Association, the
Council for Secular Humanism incorporates: A naturalistic philosophy, A cosmic outlook rooted in science, and
a consequentialist ethical system.  

American Ethical Union - A member of the Secular Coalition, AEU promotes "Ethical Culture. . .  a humanistic
religious and educational movement inspired by the ideal that the supreme aim of human life is working to
create a more humane society.

Camp Quest - funded in part by the Institute for Humanist Studies (a program of the American Humanist
Association),"Camp Quest is the first residential summer camp in the history of the United States for the
children of Atheists, Freethinkers, Humanists, Brights, or whatever other terms might be applied to those who
hold to a naturalistic, not supernatural world view.

Foundation Beyond Belief - an charitable giving organization funded by atheists and humanists which
strives to "demonstrate humanism at its best by supporting efforts to improve this world and this life and to
challenge humanists to embody the highest principles of humanism, including mutual care and responsibility."

Huumanists - The extra U indicates Unitarian.  An organization of humanist unitarians.

International Darwin Day Foundation -  provides resources and publicity for individuals and institutions
across the world to celebrate science and humanity every year, on, or near, February 12, Darwin's birthday.

Allied Organizations:

Americans United for Separation of Church and State (AU) - committed to U.S. church-state separation,
AU is composed of both religionists and atheists.
Warning: When I signed up for AU I began receiving an
inordinate quantity of junk mail.  AU ignored two letters requesting that they stop distributing my personal
information.  I have quit AU, but the junk mail keeps coming.  Do not join unless you enjoy receiving junk mail.

American Civil Liberties Union - The ACLU strives to "defend and preserve the individual rights and
liberties that the Constitution and laws of the United States guarantee everyone in this country."

Anti-Defamation League - Although a religionist group, the ADL can serve as an ally in battling Christian
domination and defending the separation of church and state.  "The Anti-Defamation League (ADL) fights
anti-Semitism and all forms of bigotry in the U.S. and abroad through information, education, legislation, and

International Organizations:

Richard Dawkins Foundation for Reason and Science (International based in UK) - [Our mission is to]
support scientific education, critical thinking and evidence-based understanding of the natural world in the
quest to overcome religious fundamentalism, superstition, intolerance and human suffering."  Home of the "
campaign," encouraging atheists to live openly.  

Institute for the Secularization of Islamic Society (International based in US) - "We are secular Muslims,
and secular persons of Muslim societies. . . . We affirm the inviolable freedom of the individual conscience. We
believe in the equality of all human persons. We insist upon the separation of religion from state and the
observance of universal human rights."  Sponsored by the U.S. based
Center for Inquiry.  

International League of Humanists (International founded in Croatia) - "International League of Humanists
was established with intention and wishes to resolve numerous peace related issues. The goal and objectives
of the ILH are to realize plans related to peace all over the world in its full meaning."  

International Humanist and Ethical Union (International, based in UK) - "IHEU is the world union of more
than 100 Humanist, rationalist, laïque, ethical culture, atheist and freethought organisations in over 40
countries. Our mission is to represent and support the worldwide Humanist movement."

Rationalist International (International, based in India) - "Rationalist International is a forum for rationalist
ideas and positions of world-wide concern. It aims at representing the rationalist view where public opinion is
formed and making the voice of reason heard and considered, where decisions are taken which will shape our

International League of Non-Religious and Atheists (International, based in Germany) - "Non-religious
[join] to stand up for freedom of religion and the freedom of one's personal view of life, as well as to decidedly
defend their political interests.

New Atheist Movement (Canada) - A Humanist organization for the promotion of Science, Reason,
Skepticism, Secularism and a Naturalistic Worldview, with a sub-goal of uniting secular universities.

National Secular Society (UK) - "The National Secular Society was founded in 1866 [and asserts that] this is
the only life we have, and that we should work for its improvement."

Atheist Centre (INDIA) - "Atheist Centre is a social change organization striving for eradication of
superstitions, inculcating rational, scientific and secular outlook for spreading positive atheism and humanism
as a way of life."

Philippine Atheists -  a community of Phillippine atheists celebrating freedom from religion.

A fine listing of international organizations is hosted by the Internet Infidels.