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Adolescents and young adults are the driving force of social development, and the prevalence of acute viral hepatitis (AVH) in this population cannot be ignored. At present, there are few studies on the disease burden of AVH in this age group, and most studies focus on chronic liver disease. In this study, we identified global trends in the burden of AVH among adolescents and young adults (15–29) to help policymakers implement precise disease interventions. In this observational study of disease trends, we collected data exclusively from the Global Burden of Disease (GBD) 2019 study. This study examined the trends in the prevalence, incidence and mortality of AVH among adolescents and young adults in 21 regions of the world from 2009 to 2019. Age‐specific disease trends were analysed with a joinpoint regression model. The overall global disease burden of AVH declined. The prevalence rate per 100,000 people decreased from 316.13 in 2009 to 198.79 in 2019, the incidence rate decreased from 3245.52 in 2009 to 2091.93 in 2019, and the death rate decreased from 0.87 in 2009 to 0.43 in 2019. During the study period, the prevalence of hepatitis B virtues (HBV) in the young population decreased, but the downward trend of other types of hepatitis other than HBV was not obvious, especially HAV, which even showed an upward trend. Among adolescents and young adults aged 15–29 years, Western Saharan Africa had the highest prevalence of AVH in 2019. There were significant differences in mortality rates among different age groups; 20–24 was the age group with the highest mortality rate from 2009 to 2019, followed by the 15–19 and 25–29 age groups. Although the overall global AVH disease burden declined, some causes of AVH, such as HAV, showed an upward trend during the study period. In addition, the prevalence of AVH among adolescents and young adults in Asia and Africa was higher than that in other parts of the world and warrants more attention. Finally, more research should be conducted on mortality in the 20–24 age group. [ABSTRACT FROM AUTHOR]