The sisterhood of Sigma Omicron Pi was established at San Francisco State University in 1930 by ten Asian American women pursuing the interest of teaching. The sorority was active in the Asian Community for the next 15 years. At the advent of World War II, the organization was forced to become inactive. In 1946, a group of women from the University of California, Berkeley re-established SOPi on their campus. Since its inception, SOPi has grown in membership with student chapters at:

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Beta Chapter: San Francisco State University, 1988

Gamma Chapter: San Jose State University, 1992

Delta Chapter: University of California, Davis, 1993

Epsilon Chapter: California State University, Sacramento, 1993

Zeta Chapter: University of California, Santa Cruz, 1995

Eta Chapter: University of Maryland, College Park, 1997

Theta Chapter: University of California, Irvine, 2001

Iota Chapter: Pennsylvania State University, 2001

Kappa Chapter: University of California, San Diego, 2002

Lambda Chapter: The Johns Hopkins University, 2002

Mu Chapter: University of California, Riverside, 2003

Nu Chapter: Binghamton University, State University of New York, 2008

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Though the sorority was no longer centered around the interest of teaching, it still maintained its commitment to the Asian American Community. All of the chapters became extremely involved in their respective communities, volunteering their time at community agencies and raising money to donate to favorable charities. Sigma Omicron Pi earned a respectable reputation as a benefactor to the Asian American cause.

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The purpose of Sigma Omicron Pi is to promote unity, lifelong friendships, leadership, and community service. This organization offers women a supportive network of sisters to achieve academic and social growth. The sisterhood of Sigma Omicron Pi provides an environment where sisters may utilize and develop their organizational skills.

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Each one of our sisters has different interests and aspirations, yet we all share one common ground - Sigma Omicron Pi. We have based our sisterhood on four objectives - UNITY, FRIENDSHIP, LEADERSHIP, AND SERVICE. In addition, Sigma Omicron Pi has a tradition of lifelong friendship that has prevailed for over 7 decades.