Eight previously unreported cases of virilizing tumors of the adrenal cortex in children are discussed. One child of the 5 with carcinoma still survives at 18 years and 2 of the 3 with adenomas are alive after 3 1 2 and 2 years, respectively. One infant was virilized at birth and had evidence of excess androgen in utero, presumably from the tumor. Three had virilization before one year of age and 2 of these are dead from metastases. All children with virilism regardless of age should have a complete assessment of endocrine function as soon as possible. © 1969.