Numerous efforts to describe the health service provider or clinical workforce in psychology have been conducted during the past 30 years. The American Psychological Association (APA) has studied trends in the doctoral education pathway and the resultant effects on the broader psychology workforce. During this period, the creation and growth of the PsyD degree and the formalization of the predoctoral internship placement system (the APPIC Match) have been well noted, but efforts to gain a complete understanding of professional practice are lacking. Specifically, piecemeal research on the provider workforce has led to the study of specific subpopulations using varying approaches and definitions of those providing direct clinical service. Consequently, estimates of the supply and need for health service providers are distinctly divergent and generate protracted debate in organized psychology. The APA membership directory and the APA Doctorate Employment Surveys have traditionally been relied on for workforce analyses. Yet, these data have become characterized by limited generalizability in recent years because of declining survey response rates and the fact that APA member data may not be as representative of the entire psychology health service provider population as they were previously. The 2008 APA Survey of Psychology Health Service Providers targeted these limitations by including nonmember psychologists in the sampling frame. Results revealed emerging themes in the demographics, work settings, and delivery of health services of the psychology health service provider workforce. Future areas of research for APA and organized psychology to undertake in addressing need and demand are suggested. (Contains 3 tables.)