Schools are a key setting for mental health promotion and the provision of emotional support to students. As teachers and school counsellors are adults with whom adolescents have regular contact, it is likely they would be used as a help source by distressed students however there are few studies on this from an Irish context. A mixed methods design was used to identify the extent of adolescent help-seeking in addition to exploring what influences a young person's decision to seek help in school. Findings generated through surveys (N = 856) and four focus group interviews (N = 35) with adolescents indicate that young people do not regard teachers and school counsellors as a potential help source. Barriers to seeking help include dislike of the dual role of counsellor/teacher and concerns about confidentiality. The provision of independent school counselling and increased mental health education were identified as factors that might increase help-seeking in school.