Adolescent adoptees from an ethnic minority background different from that of their adoptive parents can face unique challenges to their psychosocial adjustment that may include, for some, a sense of marginality and low self-esteem. Using a web-based survey design with a sample of 100 internationally adopted Asian adolescent and young adults, the present study examined how feelings of marginality mediate the relationship between ethnic and racial socialization and psychological well-being among Asian adoptees. The results showed that (a) supports for racial socialization decreased adoptees' feeling of marginality and thereby, increased their positive sense of self; and (b) ethnic socialization was not related to feelings of marginality and self-esteem. This study illustrates the importance of providing post adoption services addressing racial socialization issues. Further, adoptive parents should teach their children how to deal with racial prejudice and discrimination, and prepare them by helping them to develop positive coping strategies.