Aim This study sought to better understand the population-specific types of social support relevant to adults living with serious mental illness (SMI). Our study was exploratory and used a qualitative approach that centered on uncovering the types of social support meaningful and relevant to persons with SMI. Method The sample comprised of 52 adults receiving county mental health services in the San Francisco Bay Area. Data was gathered from six focus groups and analyzed using NVivo10 and Consensual Qualitative Research (CQR; Hill et al., 2005; Hill et al., 1997). Results Six qualitative domains were identified: a) Supportive Conditions, b) Day-to-Day Living, c) Illness Management, d) Resources and Information, e) Guidance and Advice, and f) Community Participation Support. Discussion While the six support domains share some broad-based conceptual underpinnings with traditional models of emotional and instrumental support, the domains emerging from our study represent supports uniquely tied to the stressors associated with living with an SMI, and therefore hold conceptual distinction from traditional types of support. Conclusions/Implications Findings from this study offer a conceptual framework for understanding social support for persons living with SMI and lay the groundwork for the development of a SMI-specific measure of social support. In addition, our research permits future researchers to investigate the conditions under which social support buffers the impact of SMI stressors, assisting service providers in more effective identification of individual support needs for clinical intervention.