Introduction – Since 2003, surveillance of acute hepatitis B through mandatory reporting has helped assess the impact of hepatitis B vaccination strategies. Method – An analysis of 2011–2022 data from the mandatory reporting system for acute hepatitis B was conducted. Results – Between 2011 and 2022, 840 cases of acute hepatitis B were reported, with the annual number of cases decreasing by half. The majority of cases were men (73%) with an average age of 41 years. The proportion of cases among those aged 40–49, the predominant age group in 2011–2014 (27%), decreased (to 16% in 2019–2022), while the proportion of cases aged 20–29 increased from 18% in 2011–2014 to 27% in 2019–2022. Six out of ten cases were hospitalized, and 5% had a fulminant form, suggesting an overrepresentation of severe cases. Among cases with reported risk exposure (65%), 81% were eligible for vaccination, but only 5% were vaccinated. People born abroad accounted for 60% of cases and were younger than those born in France (39 vs. 43 years, p=0.002). They more often reported travel or a stay in an area with high hepatitis B endemicity (47% vs. 19%, p