Adolescence is an important time to develop the skills for developing and maintaining good mental health. Mental health disorders among youth, however, are a concerning problem around the globe, even more so now due to the COVID-19 pandemic. This chapter explores current research on the use of technological interventions as potential solutions to this pressing problem. The majority of the current literature targets some of the most prevalent mental health disorders in youth including anxiety and depression, ADHD, and suicide. Most studies used mobile phone apps and internet-based programmes but some utilized other technologies like social media. Overall, most studies suggested that technological interventions have the potential to support adolescent mental health and well-being. We provide an overview of those studies as well as a discussion on outcomes, challenges, and the future role of technological interventions in adolescent mental health.