The aim of this review was to determine the range of outcomes reported in long-term follow-up studies of children and adolescents with chronic pain. Using a scoping review methodology, a systematic search for studies reporting outcomes in children and adolescents with chronic pain over a ≥12 month period was undertaken. Studies were eligible for inclusion if they included children and adolescents (≤18 years old on study enrolment) with chronic pain, and outcomes were followed up for ≥12 months. Overall, 42 studies investigating more than 24,132 children were included in the review. Studies assessed a total of 187 unique outcome measures within the broader measures of pain (38 studies; 90%), function (33 studies; 79%) and other (21 studies; 50%). Unidimensional assessments of the severity or presence of pain and global assessments of function were the most commonly reported outcome measures. The number of study follow-up points ranged from 1 to 5, with mode duration of follow-up 12 months post intervention (25 studies; 60%; range 1-13 years). Overall, we identified a wide range of reported outcome measures in studies of children with chronic pain. Beyond assessments of pain intensity and global function, there is little consistency, and reporting of developmental outcome measures is poor. Further long-term outcome research in this population is needed.