Hepatitis B virus (HBV) infection is a major global health problem that contributes to chronic liver diseases, such as cirrhosis and hepatocellular carcinoma. Despite advances in antiviral therapy and the availability of preventive vaccines, current treatments often do not completely eradicate the virus, particularly in chronic HBV carriers, and the incidence of liver cancer due to chronic HBV infection remains high. A major obstacle to HBV research is the lack of infection models that can accurately recapitulate the complex interactions between HBV and the host. Existing models, such as hepatoma cell lines and animal models, are limited by species-specific barriers and the lack of support for the complete viral life cycle. These limitations pose significant challenges to the study of HBV pathogenesis and the development of therapies aimed at complete eradication of HBV. In recent years, 3-dimensional (3D) liver organoids have emerged as promising in vitro model systems to study HBV infection and HBV-mediated liver disease. These organoids serve as a suitable physiologically relevant platform for investigating HBV pathogenesis, including the ability of HBV to promote liver tumorigenesis. Furthermore, liver organoids can be genetically modified, patient-derived, expanded, and biobanked, providing a powerful tool for studying HBV pathogenesis and personalized medicine, drug discovery, and screening. In this review, we explore the utilization of 3D liver organoids as a research model for studying HBV infection and HBV-associated liver cancer, highlighting their advantages over conventional models.