Marginalized children are often excluded from mainstream social, economic, cultural, and political life because of ethnicity or poverty. These children are more likely to have behavior problems that place them at risk later in life. The impact is evident at an early age. The purpose of this article was to review the literature that examined the impact of child-centered play therapy (CCPT) conducted with marginalized children. The literature was reviewed with regard to the results of the studies, the outcome variables used, the identification of who completed the assessments about the children, and the ethnicity of the play therapists who conducted the interventions. The findings demonstrated that CCPT is effective for marginalized children, externalized behaviors are most frequently assessed, teachers most frequently completed the assessments about the children, and the ethnicity of the play therapists is not usually reported. The results are considered in terms of implications for play therapists and future research. (PsycINFO Database Record (c) 2019 APA, all rights reserved)