[영문]Immigrant and refugee families and children represent the fastest growing portion (11%) of the U.S. population. As recent studies suggest, they also are at the greatest risk for problems associated with poverty, including involvement with the public child welfare system. While public child welfare services agencies can play a pivotal and unique role in providing much-needed help and services to these families, too often they are unprepared to meet the special challenges presented by immigrants and refugees and, as a result, fail to serve them appropriately. Little current literature addresses the salient policy and practice issues involved in working with this population, or offers technical assistance, resources, and ideas to improve services. This special issue of Child Welfare represents an initial effort at providing a clearer picture of what happens when immigrant and refugee families, children, and youth intersect with the public child welfare system. The educators, researchers, direct service providers, and community activists who have contributed articles each made an effort to identify and address the special needs of the immigrant and refugee population. The articles presented here contribute to the knowledge base of social work interventions with specific populations, share information to promote an examination of best practices within the child welfare context, and address policies that affect access to services and resources for this population. The ideas expressed here hopefully will help expand the definition of culturally competent practice in child welfare services to include a greater emphasis on understanding the effect of immigration status and the migrant experience on families and their children