Characteristics of cities and states were correlated with measures of the geographic distribution of U.S, psychologists. Correlations for psychologists providing mental health services were compared with correlations for psychiatrists, clinical socM workers, and school guidance personnel. Population size is the strongest correlate of the absolute number of psychologists in various states and cities. When number relative to population is considered, psychologists are concentrated in affluent urban states and in university towns. The same pattern was obtained for all the groups providing mental health services. No evidence was obtained that any of these groups is distributed in a way offering special advantages for serving groups such as poor, black, or rural people, who appear to need better access to mental health services.