"Data Trends" reports present summaries of research on mental health services for children and adolescents and their families. The article summarized in this "Data Trends" discusses research on mental health care utilization among young children, up to age seven, in a low-income urban setting. Overall, the study indicates that there is a high incidence of mental health problems requiring treatment, at least among some groups of young children. The results also raise important questions about the identification of mental health problems among young children, about disparities in access to treatment, and about differences in how distress may be expressed and interpreted at different ages, and among different groups. In addition, it should be noted that while the majority of children in this study, identified by their parents as needing treatment during the six year study period, did have access to some treatment, this does not address issues about the timeliness or adequacy of the mental health services received. It is evident from these results that change is required to remove the barriers to mental health services for African American children and girls. A better understanding of the needs of young children, and services that are responsive to mental health problems that may vary by age, gender, or other differences, is essential if the high rate of unmet mental health needs among young children is to be reduced. [This "Data Trends: presents a summary of: Thompson, R. (2005). The course and correlates of mental health care received by young children: Descriptive data from a longitudinal urban high-risk sample. Children & Youth Services Review, 27, 39-50.]