Vaccine hesitancy re-emerged as a critical public health issue during the COVID-19 pandemic. This study assessed the concerns of recovered COVID-19 patients about vaccination and the predictors of vaccine hesitancy. This was a cross-sectional study of 319 adult patients who recovered from COVID-19 in Saudi Arabia. It was conducted during 1 May to 1 October 2020 at King Abdulaziz Medical City, Riyadh. Each participant was interviewed 6-12 months post-recovery using the vaccination attitude examination scale. Data were collected on COVID-19 illness severity, sociodemographic characteristics, history of chronic disease, and post-COVID-19 vaccination. Level of vaccination concern was assessed based on the percentage mean score (PMS). Most (85.3%) of the patients who recovered from COVID-19 expressed moderate overall concern (PMS = 68.96%) about vaccination. Concern was highest for mistrust in vaccine benefits (PMS = 90.28%), followed by natural immunity preference (PMS = 81.33%) and worries about the vaccine side-effects (PMS = 60.29%). Concern over commercial profiteering was low (PMS = 43.92%). The overall PMS for concern about vaccination was significantly higher among patients aged 45+ years (t = 3.12, P = 0.002) and among those who had experienced severe COVID-19 illness (t = 1.96, P = 0.05). Overall concern about vaccination was high, and specific concerns were prevalent. Patient education on how the vaccine protects against reinfection should be targeted at COVID-19 patients before being discharged from hospital.