Adult day care (ADC) is increasingly acknowledged as a key component of community-based long-term care. However, there is a lack of consensus on how to classify ADCs and what constitutes a model of service delivery. Despite the growing importance of ADCs, development of and access to this service has been hindered by the absence of uniform funding and regulation and the lack of policy development and consensus on definitions as well as a shrinking tax base. The research sample for this study was selected from standard metropolitan statistical areas in California, Florida, Pennsylvania, Texas, and Washington. Findings point to the continual growth of ADCs, rising demand from potential clients for them, and use of centers by clients with higher levels of disability than previously. They also show relationships between funding and staffing, the types of clients served or not served, and the types of service provided. Further research is needed to clarify lhe relationships between service models, funding, client mix, and policy.