[4] Thirteen Latina women established Alpha Pi Sigma on March 10, 1990, at San Diego State University.

The chapters carry out these purposes, including academic excellence, leadership development, cultural awareness, unity and friendship, empowerment, and community service.

[3] The sorority is a member of the National Association of Latino Fraternal Organizations (NALFO) and holds a strict anti-hazing policy.

[7] Both active sisters and alumnae are encouraged to raise funds to support the sorority's national philanthropy.

[1][9][3] There are seventeen active chapters of Alpha Pi Sigma in the United States, most in California.