The stress process model of caregiving posits that caregivers' internal psychosocial resources may serve as buffers between the stress associated with caregiving and well‐being. Empirical support for the stress process model exists for several caregiving contexts, but little research has investigated the Parkinson's disease caregiving experience in Mexico. Using a cross‐sectional, correlational design, the objective of this study was to examine whether resilience moderates the relation between perceived stress and health‐related quality of life (HRQOL) among Parkinson's disease caregivers in Mexico. Data were collected from April 2015 to February 2016 during outpatient neurology appointments in Mexico City, Mexico. Participants included informal caregivers (N = 95) for a family member with Parkinson's disease. Participants completed a battery of questionnaires assessing their level of perceived stress, resilience, and HRQOL. Regression analyses indicated that resilience moderated the inverse relation between perceived stress and mental HRQOL. However, contrary to hypotheses, resilience did not moderate the relation between stress and physical HRQOL. Findings shed light on resilience as a potential protective factor for mental HRQOL among Parkinson's disease caregivers in Mexico and indicate that resilience may be beneficial to target in mental health promotion interventions.