BackgroundThere is considerable evidence of widespread emotional distress associated with the COVID-19 pandemic. A growing number of studies have assessed posttraumatic growth related to the current pandemic; but, none have considered whether reported growth is real or illusory (i.e., characterized by avoidant or defensive coping that results in higher levels of distress). The purpose of this study was to extend this literature by assessing growth specific to the pandemic in people reporting high levels of COVID-related stress and estimating the extent of real and illusory COVID-19-related growth. MethodsParticipants were 893 adults from Canada and the United States with high levels of COVID-related stress who provided complete responses on measures of posttraumatic growth, disability, and measures of general and COVID-related distress as part of a larger longitudinal survey. ResultsApproximately 77 % of participants reported moderate to high growth in at least one respect, the most common being developing greater appreciation for healthcare workers, for the value of one’s own life, for friends and family, for each day, as well as changing priorities about what is important in life and greater feelings of self-reliance. Consistent with predictions, cluster analysis identified two clusters characterized by high growth, one comprising 32 % of the sample and reflective of real growth (i.e., reporting little disability and stable symptoms across time) and the other comprising 17 % of the sample and reflective of illusory growth (i.e., reporting high disability and worsening symptoms). These clusters did not differ in terms of socially desirable response tendencies; but, the illusory growth cluster reported greater increases in alcohol use since onset of the pandemic. ConclusionConsistent with research regarding personal growth in response to prior pandemics and COVID-19, we found evidence to suggest moderate to high levels of COVID-related growth with respect to appreciation for healthcare workers, life, friends and family, and self-reliance. Findings from our cluster analysis support the thesis that many reports of COVID-related personal growth reflect ineffectual pandemic-related coping as opposed to true growth. These findings have important implications for developing strategies to optimize stress resilience and posttraumatic growth during chronically stressful events such as pandemics.