Aim: To explore the barriers to accessing mental health services in the Republic of Ireland from the perspectives of young LGBT + people aged 14–25. Background: Significant mental health disparities exist between LGBT + young people and their cisgender and heterosexual peers, yet they do not have equitable access to mental health services. Limited research has explored barriers, which exist for LGBTI + young people in accessing services, particularly from their perspectives. Method: An anonymous online survey design, consisting of closed and open questions, was used. The study was advertised through local and national organisations and media. 1,064 LGBT + participants aged 14–25 opted to complete the survey. Results: Most participants reported several barriers to them accessing mental health services that were interlinked across three levels: individual; sociocultural; and mental health system. Conclusion: Cultural competency training for practitioners, which address issues and concerns pertinent to LGBT + young people, is key to addressing many of the barriers identified. Implications for Nursing Management: Nurse managers can use the findings to advocate for practice and organisational change within their services to ensure that care and support is responsive and sensitive to the particular needs of LGBT + young people.