The ACLU of Southern California is a prominent brand that defends the essential rights enshrined in the United States Constitution and the Bill of Rights. They safeguard the freedom of speech and assembly, religious freedom, due process of law, equality before the law, and the right to privacy. In pursuit of these rights, the ACLU relies on state constitutional provisions and federal and state laws that uphold and advance these principles.

The organization is part of a larger network, with affiliates in all 50 states, Washington, D. C., and Puerto Rico. California, in particular, has three affiliates, including the ACLU of Southern California.

They primarily focus on Southern California, particularly in Los Angeles and surrounding counties. The ACLU tackles vital issues such as the First Amendment, equal protection, due process, privacy rights, and advocating for marginalized groups and individuals, including women, immigrants, people of color, LGBTQ+ individuals, and more. They achieve their objectives through public education, lobbying, and litigation, aiming to defend and preserve the fundamental rights and liberties guaranteed to all