Personal values are broad motivational goals that have been found to have systematic relations with subjective wellbeing in adults. Values that promote higher subjective wellbeing are considered "healthy" while those that hamper it are considered "unhealthy" (Schwartz & Sortheix, 2018). However, little is known about these relations in children. This pre-registered study examined (1) whether the values of children (6 to 12 years of age) relate to their subjective wellbeing and (2) whether these relations are moderated or mediated by perceived social support from parents, teachers, classmates, and close friends. These research questions were examined with a sample of 738 primary school students (50% female). Our results show that "healthy" growth values were positively related to subjective wellbeing overall, and for the subgroups of girls and children 9 to 12 years but not boys and children 6 to 8 years; however, "unhealthy" anxiety values were only negatively associated with subjective wellbeing for girls. While perceived social support partially mediated relations between growth values and subjective wellbeing, the direct values-wellbeing relations accounted for over half the variance. Interestingly, this study also found that growth values positively, and anxiety values negatively, influenced perceived social support from all referents. While perceived social support did not moderate values-wellbeing relations in the overall sample, differences were found in the way perceived social support moderated these relations in some age and gender subgroups. Taken together, these findings suggest that "healthy" growth values positively influence subjective wellbeing in middle childhood, even after accounting for perceived social support.