Pharyngula

1392 members Latest Activity: Mar 20 A group for regular (and irregular) readers of PZ Myers' blog Pharyngula.

The OUT Campaign

468 members Latest Activity: Apr 29 Come OUT and embrace your atheism!

Military Atheists (MAAF Official)

404 members Latest Activity: May 14

This is a group for anyone who is or ever has been in the military. And it has the longest name ever, just for search purposes. Be sure to sign…

Astronomers

163 members Latest Activity: May 17 A group for people who enjoy the stars. :)

the Polish corner

18 members Latest Activity: Sep 6, 2012 A place for Polish unbelievers to discuss their brains out. PSR members espc. welcome. Don't forget to join European Atheists group, too!

Jewish Atheists

81 members Latest Activity: Jun 2 For Atheists of Jewish origin and others interested in Jewish history and culture.

Mathematics

84 members Latest Activity: Jun 9 Welcome to the world of math

Seattle Tacoma area Atheists

57 members Latest Activity: Nov 22, 2012 A Group for Atheists living in the Seattle, Tacoma, and Ft. Lewis-McCord areas

Secular Sexuality

678 members Latest Activity: 36 minutes ago (NSFW) A no-taboo approach to sexual education and health.

Physicists

161 members Latest Activity: Jan 14 Many questions are more important then the expected number of gods in the Universe. We deal with the laws and phenomena of Nature.

Medical Atheists

203 members Latest Activity: Mar 7 Atheists working / interested in the medical / health arena including psych. Discussion about abortion, right to die, suicide, the interference of…