Past research has investigated the development of stereotypes surrounding race and gender in children; however, there is a lack of literature examining the development of children's stereotypes of older adults. In this study, 163 children from four grades: first (n = 44), fourth (n = 49), fifth (n = 35), and eighth (n = 35) completed a new trait-rating questionnaire assessing their stereotypes of older adults. Children's stereotypes of older adults were largely positive. Younger children described older adults in more positive, but more stereotyped, ways than older children. Older children's views shared a stronger relationship with those of their parents and peers compared to younger children. Together, these results support both cognitive development and social influences as contributing factors to the formation of children's stereotypes of older adults.