When hospitalized, adults with intellectual disabilities are more anxious and have more unmet needs than the general population. Despite these problems, studies report contradictory results about their satisfaction with hospitalization. The aim of this study was to determine the level of satisfaction of adults with intellectual disabilities regarding their hospital care and the factors associated with satisfaction. An analysis of the Patient Satisfaction Scale (PSS) and Cognitive Appraisal of Health Scale (CAHS) instruments completed by adults with intellectual disabilities, or their caregivers, after hospitalization was done. The 32 participants’ mean PSS score was 3.6/5, with means of 13.3/25 and 8.7/25 on the CAHS’ ‘harm/loss’ dimension and ‘challenge’ dimension, respectively. None of the factors studied was associated with the total PSS score. Adults with intellectual disabilities were not fully satisfied with their hospital care, experiencing challenges and losses. These findings call for a rethink of the care provided to this population.