Background: This study assesses health-related quality of life (HRQOL), and variables associated with HRQOL, in children and adolescents with haemophilia and congenital bleeding disorders (CBD) in the Netherlands. Methods: Patients <18 years with CBD under treatment at the Hemophilia Comprehensive Care Center of the Academic Medical Center were included. Participants completed generic HRQOL questionnaires (TAPQOL 0-5 years; PedsQL 6-18 years). Differences and effect sizes in HRQOL compared to healthy peers, and between hemophilia severity groups, were tested using Mann Whitney U-tests. Multivariate regression analyses were performed to assess variables associated with HRQOL. Results: Data of 145 patients (81%) were analyzed (N = 32 with severe haemophilia). Children (0-12 years) show no significant impairments in HRQOL compared to healthy peers. Adolescent boys (13-18 years) with CBD report a slightly higher HRQOL on the total and emotional functioning scales than healthy peers (small-moderate effect sizes). In contrast, adolescent girls experience lower HRQOL on total, social functioning and psychosocial health scales compared to healthy peers (moderate effect sizes). No differences between severity groups were found in HRQOL, but more problem behaviour was found in young boys (0-5 years) with severe haemophilia. Male gender, participation in sports and school attendance are positively associated with HRQOL. Parental country of birth, type of treatment and number of bleeds are not associated with HRQOL. Conclusion: Continuing monitoring HRQOL in daily clinical practice for children with CBD is important, since possible influencing psychosocial factors can change over time, with special focus on adolescent girls, sports participation and school absence.