Fifty-six patients 80 or more years of age, admitted because of head injury, provide a clinical profile of the effects of head injury upon an aging population. The mortality rate is high, even in those with good admission Glasgow coma scores. The incidence of intracranial mass hematoma is striking. Falls in the residence constitute the principal mechanism of injury, and preexisting medical conditions are important contributing factors. A significant proportion (60%) of old people may make a full recovery from head injury.