The California South Weightlifting State Organization (WSO) is a 501(c)(3) group exemption sub-committee of USA Weightlifting whose mission statement is:

To foster the growth and advancement of weightlifting in the Southern California, adhering to the regulations and governance established by the California South Weightlifting State Organization and USA Weightlifting, Inc. Our purpose is to educate, promote, conserve, sponsor, coordinate, and stimulate the interest of Weightlifting, as an amateur sport, throughout our Association, Region, and Nation in accordance with the standards and regulations set forth in the USAW bylaws.