There continues to be considerable interest in the potential of mixed-income housing and neighborhoods to alleviate poverty, desegregate neighborhoods in terms of household income, and revitalize neighborhoods. This annotated literature review, prepared with support from the Casey Foundation, surveys the research on mixed-income housing that focuses on the impact on low-income children and adults. The review examines definitions of mixed-income, hypothesized benefits for low-income families, evidence of benefits, and viability of mixed-income areas over time. It concludes by identifying research gaps that foundations might consider addressing through the support for future work.