The Child Abuse Prevention and Treatment Act requires child welfare agencies to have provisions in place to refer young children to early intervention services, yet the socioemotional health needs of children are often challenging to recognize and treat effectively. This study reviews the substantive and psychometric properties of screening instruments designed for children ages 10 and younger. Methods: Major social science databases, websites of national organizations, and the Mental Measurements Yearbook were used to identify instruments for review. Results: Twenty-four instruments met review criteria, and eight show above-average measurement properties and testing, tap children's strengths and concerns, and have evidence of validity with families similar to child welfare-involved families. Discussion: It is important to effectively screen for children showing concerns in early childhood, so that treatment and prevention can be prioritized. This study indicated several tools with adequate testing and with emerging evidence and applicability to child welfare. Keywords children, child welfare, mental health, screening Child welfare agencies are part of a group of providers responsible for ensuring that children receive adequate mental health care. Because child welfare workers do not typically provide mental health services themselves, their primary role is to provide a gateway for children and families to access services through referral, consultation, and liaison (McCarthy, Marshall, Irvine, & Jay, 2004; Stiffman, Pescosolido, & Cabassa, 2004). Changes in federal policy and monitoring through the Child Abuse Prevention and Treatment Act (CAPTA) and the Child and Family Service Reviews increase child welfare's role in protecting children's mental health and development. States are required to have procedures in place to refer all children under age 3 who are substantiated for maltreatment to early intervention services (CAPTA, 2003). States are also rated in periodic federal reviews on the extent to which "children receive adequate services to meet their physical and behavioral health needs" (U.S. Department of Health and Human Services, Administration on Children and Families, 2000, p. 4023). This includes systemic factors such as having an array of services available to meet wide-ranging family needs (U.S. Department of Health and Human Services, Administration on Children and Families, 2007). It also includes factors regarding individual children such as whether they received an accurate mental health or developmental assessment initially and on an ongoing basis (U.S. Department of Health and Human Services, Administration on Children and Families, 2016). Case reviewers determine, among a select number of cases, whether the child should reasonably have been expected to receive a mental health assessment, and if affirmed, whether such an assessment was provided and the child received appropriate services (U.S. Department of Health and Human Services, Administration on Children and Families, 2016). These are si...