The Edinburgh Study of Youth Transitions and Crime is a prospective longitudinal cohort study aimed to examine criminal offending in young people by investigating the causes and consequences of young people’s involvement in crime and anti-social behaviour. The study follows a cohort of around 4,300 young people who started secondary school in the City of Edinburgh in the autumn of 1998. Data collection spans from their early adolescence (age 12) to adulthood (age 33) through self-report questionnaires as well as in-depth interviews with two cohort sub-samples at ages 24 and 35 years. The study also includes linked administrative data from official records, including education, social work, and criminal conviction records.