A survey of the statutes on juvenile transfer and decertification in the U.S. federal and 50 state jurisdictions, and the District of Columbia, was performed. Relevant information was obtained on the procedures in each jurisdiction by which a juvenile can be tried in criminal court, whether there are applicable decertification ("transfer back") procedures in jurisdictions permitting criminal court processing through automatic file or prosecutorial discretion, and the burden and allocation of proof in relevant proceedings. We also identified four criteria relevant to the mental, emotional, and developmental functioning of juveniles that are used in various jurisdictions in making transfer and decertification decisions: treatment needs and amenability, risk assessment of future criminality, the presence of mental retardation or mental illness, and certain kinds of offense characteristics. The majority of jurisdictions now allow 14-year-old juveniles to be tried in criminal court. Treatment needs/amenability and risk assessment are set forth as criteria relevant to transfer in the majority of jurisdictions as well, with the presence of mental retardation or mental illness explicitly relevant in a small number of jurisdictions. The patterns of these findings are discussed in their implications for social policy and for the forensic mental health assessment of juvenile transfer and decertification, with needed areas of research identified within each.