Public libraries in the United States are visited daily by vast numbers of people experiencing unmet psychosocial needs including poverty, homelessness, immigration concerns, mental health, substance abuse, and health problems. While some libraries have begun to hire or partner with social service personnel, many library staff are facing patron psychosocial crises without adequate training or resources. Various studies examine different facets of this issue; however, none examine how library staff perceive their role, patron psychosocial needs, library responsibility to address psychosocial needs, and policy and program recommendations. This study addresses that gap and presents needs assessment results from a large metropolitan public library system. Recommendations are included for how social workers can help libraries meet patron psychosocial needs.