College opportunity is key to ensuring that California can meet its economic goals, maintain its global standing, and keep up with technological advances. As California's economy becomes increasingly reliant on a better-educated workforce and further connected to a global marketplace for its services and products, immigrant students are poised to make major contributions to future growth. Nearly 27 percent (three million) of the United States' undocumented immigrants reside in California. Among this diverse population of undocumented immigrants, however, few adults have a college degree. Conservative estimates find that between 64,000 and 86,000 undocumented students are enrolled in California's public higher education systems. This brief has information on California's undocumented residents, public policies that have shaped the current state of college opportunity for undocumented students, and the key findings from conversations with undocumented students regarding financial aid, campus resources, legal services, and more. [Extensive contributions by Leticia Tomas Bustillos. Additional contributors to this brief include Jake Brymner, Sasha Perez, and Linda Vasquez. Additional funding from The Morris and Mayer Kaplan Family Foundation.]