Some of the early literature implied that emotional disorders were almost incompatible with hyperactivity in childhood. The paper addresses this issue using a large epidemiological data base--of two cohorts of 7- & 8-year-old and 11- & 12-year-old children from the North of England. There are two themes, first, the paper reports on the prevalence of emotional symptoms and disorder among hyperactive children. Second, it explores co-occurrence of hyperactivity and emotional psychopathology according to whether the hyperactivity is situational or pervasive and according to the age of the child. Hyperactivity proved to have an association with emotional symptoms and disorder at both ages but the links with disorder were most prominent among the older children. Among our high risk or maladjusted samples the strongest links were with home-based situational hyperactivity. However, among the general population cohort, emotional disorder proved to be a function of pervasiveness of hyperactivity and older age.