The present study summarizes research on youth narcissism and examines the relations between different measures of youth narcissism and various indicators of behavioral, emotional, and social functioning. This area of research has grown dramatically in only a few years and speaks to the recognized role of self-perception in general and narcissism specifically in youth adjustment. Data are presented for 117 adolescents ages 16 to 19 attending a residential program. Results showed a moderate level of association across three measures of youth narcissism. In addition, each of the measures appeared to capture unique variance in different indicators of behavioral and social functioning. The implications of this area of research for conceptualizations of youth personality, assessment, and behavioral problems are discussed.