BACKGROUND Clinical experience and progressive autonomy are essential components of medical education and must be balanced with patient comfort. While previous studies have suggested that most patients accept trainee involvement in their care, few studies have focused specifically on the views of parents of pediatric patients or examined groups who may not report acceptance. OBJECTIVE The purpose of this study is to understand parental profiles of resident and medical student involvement in pediatric care and to use latent class analysis (LCA) methodology to identify classes of responses associated with parent demographic characteristics. METHODS We used data from a national cross-sectional online survey of 3,000 parents. The survey used a 5-point Likert scale to assess 8 measures of parent perceptions of residents and medical students. We included participants who indicated prior experience with residents or medical students. We compared responses about resident involvement in pediatric care with responses about student involvement, used LCA to identify latent classes of parent responses, and compared demographic features between the latent classes. RESULTS Of the 3,000 parents who completed the survey, 1,543 met inclusion criteria for our study. Participants reported higher mean scores for residents than for medical students for perceived quality of care, comfort with autonomously performing an exam, and comfort with autonomously giving medical advice. LCA identified three latent classes of parent responses: Trainee-Hesitant, Trainee-Neutral, and Trainee-Supportive. Compared with the Trainee-Supportive and Trainee-Neutral classes, the Trainee-Hesitant class had significantly more members reporting age < 30, household income < $50,000, no college degree, and lesser desire to receive future care at a teaching hospital. CONCLUSIONS Parents may prefer greater clinical autonomy for residents than medical students. Importantly, Trainee-Hesitant views may be held disproportionately by members of historically and currently socially marginalized demographic groups. Future studies should investigate underlying reasons for trainee hesitancy in these groups, including the possibility of mistrust in medicine.