Vietnam is among the countries with the highest prevalence of chronic hepatitis B (CHB) and individuals who suffer from CHB oftentimes perceive high levels of stigma and discrimination. Our study aimed to provide evidence on the prevalence of stigma against hepatitis B virus (HBV), HBV infection, and social determinants of stigma and discrimination in patients. A cross-sectional study was conducted at Viet-Tiep Hospital, Hai Phong, Vietnam. Stigma and discrimination against CHB in the last month were measured via four dimensions: (1) Blame/Judgment; (2) Shame; (3) Discrimination in different settings; (4) Disclosure of CHB status. Multivariate Logistic and Tobit regressions were used to identify factors associated with CHB-related stigma and discrimination. Among 298 enrolled patients, 4.8% experienced blame/judgement, 10.2% perceived shame, 48.5% felt discriminated in healthcare facilities, and 90.6% disclosed their health status with spouses/partners. Factors associated with lower odds of CHB-related stigma/discrimination included living with spouses/partners, old age, being employed, and the existence of comorbidities was linked with higher odds of stigma. Anti-stigma programs should target those who are younger and have comorbidities. This could be done by community-based interventions which focus on inaccurate beliefs about viral hepatitis. Furthermore, families, healthcare providers, and society should play a crucial role in supporting CHB patients.