Founded in 1980, the University of San Diego School of Law's Center for Public Interest Law (CPIL) serves as an academic center of research and advocacy in regulatory and public interest law. CPIL focuses its efforts on the study of an extremely powerful, yet often overlooked, level of government: state regulatory agencies. Under the supervision of experienced public interest attorneys and advocates, CPIL law student interns study California agencies that regulate business, professions, and trades.

CPIL publishes the California Regulatory Law Reporter, a unique legal journal that covers the activities and decisions of 25 major California regulatory agencies.

In addition to its academic program, CPIL has an advocacy component. Center faculty, professional staff, and interns represent the interests of the unorganized and underrepresented in California's legislature, courts, and regulatory agencies. CPIL attempts to make the regulatory functions of California government more efficient and visible by serving as a public monitor of state regulatory activity. The Center has been particularly active in reforming the state's professional discipline systems for attorneys and physicians, and in advocating public interest reforms to the state's open meetings and public records statutes.