This study examines 5 types of personality continuity-structural, mean-level, individual-level, differential, and ipsative-in a representative population (N ϭ 498) and a twin and sibling sample (N ϭ 548) of children and adolescents. Parents described their children on 2 successive occasions with a 36-month interval using the Hierarchical Personality Inventory for Children (I. . There was evidence for structural continuity in the 2 samples, and personality was shown to be largely differentially stable. A large percentage had a stable trait profile indicative of ipsative stability, and mean-level personality changes were generally small in magnitude. Continuity findings were explained mainly by genetic and nonshared environmental factors.