The Atheist Community of Austin is a 501(c)(3) non-profit organization dedicated to promoting positive atheist culture and the separation of religion and government. The ACA serves the local Austin community through outreach programs, providing informational resources and various volunteer activities. In addition, the ACA serves the community-at-large through free online video and podcast programs.

We define atheism as the lack of belief in gods. This definition also encompasses what most people call agnosticism.