Posttraumatic stress disorder (PTSD) remains a highly stigmatized disorder despite its prevalence. Given that the origin of stigmatization is rooted in cognitive representations that people hold, stigma may be differentially exhibited by people with varying degrees of cognitive flexibility. Intellectual humility, the recognition of one's own intellectual shortcomings or flaws, may allow for flexibility in how people navigate knowledge surrounding PTSD, which may reduce stigma and improve interpersonal interactions with individuals with PTSD. The present study investigated whether intellectual humility would negatively predict PTSD stigma and social distance, above and beyond demographic factors and personal or social experience with individuals with PTSD. Participants (