Transition-age youth with foster care involvement (TAY, ages 17-22) are at heightened risk for suicidal behavior. Despite this, mental health screenings are not standardized across child welfare (CW) systems and existing assessment tools are not designed for use with this specific population. As such, TAY are unlikely to be adequately screened for suicide risk and connected with needed services. In this paper, we sought to identify screening and assessment tools that could be effective for use with TAY in CW settings. Using PubMed and PsycINFO, we conducted a search of the current literature to identify some of the most commonly used screening and assessment tools for youth. We then narrowed our focus to those tools that met predefined inclusion criteria indicating appropriateness of use for TAY in CW settings. As a result of this process, we identified one brief screening tool (the ASQ) and four assessments (the SIQ-JR, the C-SSRS, the SHBQ, and the SPS) that demonstrated specific promise for use with TAY. The strengths and limitations of the tools are discussed in detail, as well as the ways that each could be used most effectively in CW settings. We highlight three key points intended to guide social work practice and policy: (1) systematic, routine assessment of mental health and suicide risk across CW settings is critical; (2) the protocol for assessing suicidal behavior in TAY must account for the wide variations in context and service provision; and (3) CW workers administering assessments must be thoughtfully trained on risk identification and the protocol implementation.