The ACLU Foundation of Northern California has filed a lawsuit to protect the constitutional rights of defendants with psychiatric and intellectual disabilities in California.

In November 2022, the ACLU of Northern California filed a lawsuit to compel the city of Vallejo to release public records that contain information about officers in the Vallejo Police Department who bent their badges after on-duty shootings, allegedly as a badge of honor. The ACLU's petition details Vallejo PD's long history of shooting and killing people, a disproportionate number of whom are People of Color. 

On July 14, 2021, the ACLU Foundation of Northern California, the Law Foundation of Silicon Valley, Disability Rights Advocates, King & Spalding LLP, and Hewlett Packard Enterprise filed a class action complaint against the City of Mountain View for enacting two ordinances that, together, severely restricted when and where “oversized vehicles” (OSVs) could park in the City.