This paper reports on the first national survey of adults concerning a history of childhood sexual abuse. Victimization was reported by 27% of the women and 16% of the men. Higher rates of abuse were found among men who grew up in unhappy families, lived for some period with only their mothers, who were currently residing in the West and who came from English or Scandinavian heritage. Higher rates of abuse were found among women who grew up in unhappy families, lived for some period without one of their natural parents, received inadequate sex education, were currently residing in the West or who were born after 1925.