In response to patient, provider, and clinic preferences and resources for depression care, we developed but have not yet tested an innovative, theoretically-based group intervention, drawing upon two evidence-based interventions that improve self-efficacy: group cognitive behavioral therapy (CBT) for depression and group self-management for chronic medical illness. Professionally-led group CBT is effective for depression among ethnic minorities in primary care but is difficult to sustain. Among patients with chronic medical illness, lay-led group self-management programs educate and empower patients to engage in healthful behaviors and participate in their care. The groups improve self-efficacy, health-related behaviors, and outcomes; have been adapted for diverse conditions; and have been widely disseminated and sustained. However, standard self-management groups do not improve depression. We thus enhanced the Spanish-language Tomando Control de su Salud chronic disease self-management program by adding depression-related educational and skill-building content from group CBT.