This study aims to measure the mental well-being levels of librarians in Vietnam in the new normal context  after  the  COVID-19  pandemic.  The  findings  are  expected  to  advocate  for  future  policy interventions regarding mental health care for staff in Vietnam’s libraries and information centres since the pandemic has made coping with crises globally recognised as an integral part of life. On this ground, a survey was designed and administered online for librarians across Vietnam to self-rate their psychological general well-being using the World Health Organization (WHO)-5 together with the Revised Life Orientation Test (LOT-R) and Strahan-Gerbasi’s 1972 short version of the Marlow-Crowne Social Desirability Scale. The results show that despite the low mid-COVID mental health, there was a statistically significant increase in mental health scores in the new normal. Approximately two-thirds of the surveyed librarians were infected with COVID-19. In both mid- and post-COVID mental health scores,  there  were  significant  differences  between  the  infected  and  uninfected  groups,  between different marital and parenthood statuses, and between different age groups, seniority levels, and types of positions.