Children, youth, and families served by child welfare professionals should be provided with services that are reasonably well-supported by scientific evidence, when such knowledge exists. A number of clearinghouses and databases have been created in recent years that list a wide array of child welfare, mental health, substance abuse, family, and educational services, provide a critical appraisal of the levels of evidence available for each such service, and rates this evidence. Some interventions are said to possess strong evidence of their effectiveness and can be called research supported. Others are poorly researched and some have been shown to actually be harmful. This article describes a summary of these major databases and clearinghouses evaluating programs and practices for potential use in child welfare. Links are provided to assist child welfare professionals in locating these research supported psychosocial interventions.