Childhood trauma has been associated with psychological dissociation, but there is evidence that trauma may also result in somatoform dissociation. We performed a general population study with 1739 subjects, using the Somatoform Dissociation Questionnaire, measures of adverse childhood experiences, and sociodemographic background. The prevalence of high somatoform dissociation (Somatoform Dissociation Questionnaire ≥30) was 9.4% in the Finnish general population. Unemployment, a reduced working ability, and a poor financial situation were associated with high somatoform dissociation. Of the adverse childhood experiences, high somatoform dissociation was strongly linked to physical punishment but not associated with domestic violence, including sexual and physical abuse. The odds of high somatoform dissociation were also increased among men by a poor relationship between their parents, and among women by alcohol abuse in their childhood home. We found a strong, graded relationship between an increasing number of adverse childhood experiences and high somatoform dissociation.