Abstract The COVID-19 pandemic poses risk for worsened quality of life in patients with adult congenital heart disease. In a qualitative thematic analysis of semi-structured interviews conducted July 2020 to August 2021, we examined the pandemic’s impact on participants’ (N = 25) experiences with self-perception and coping. All had moderate or complex disease; median age 32 years. The pandemic altered some participants’ self-perception, including increased vulnerability beyond heart-attributed risk. Restrictions frequently prevented participants from using their usual coping strategies, forcing use of alternative methods. For an already at-risk population, these findings suggest the need for increased mental health awareness, assessment, and support.