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Underserved populations have a wide heterogeneity on healthcare provision and use. They also represent the key populations according to WHO 2030 goals for HCV micro-elimination. Our review evaluated the available literature on HCV diagnosis, staging, and treatment among underserved populations, such as incarcerated people, patients with psychiatric disorders, and migrants. A narrative review of literature was performed using key electronic databases (Scopus, Pubmed-MEDLINE) and search engines (Google Scholar). Peer-reviewed publications, grey literature on HCV, and recent models proposed for micro-elimination in underserved populations were included. An insight into the COVID-19 pandemic and its influence on HCV micro-elimination pathways will be also provided. Regarding prison settings, a progressive reduction in HCV epidemiology among incarcerated people in the last years was found (one-third of the level it had been before). People suffering from psychiatric disorders have a high anti-HCV prevalence, but there is a lack of data on active infections. A bidirectional relationship between HCV and psychiatric disorders was found. Migrants showed a very inconsistent assessment of HCV. Furthermore, available studies recorded data from populations with high heterogeneity of anti-HCV prevalence, Therefore, the reported results need caution in their evaluation.