Many adolescents who meet diagnostic criteria for an eating disorder do not self-identify as having a problem and may consequently be less likely to seek help. Extant research investigating self-identification has been limited to specific populations (ie, girls meeting criteria for bulimic-type eating disorders). This study investigated how self-identification varied across sex, eating disorder diagnoses, and the presence of extreme eating behaviours, and how self-identification was related to help-seeking in adolescents.