The study sample consisted of 489 white males processed by juvenile probation authorities in several Idaho counties. Although all files contained information on the current status of the juvenile's family structure, files in 101 cases in which homes were broken did not indicate how the home was broken. The elimination of these cases left 388 cases for analysis. Maltreatment had a greater impact on violent delinquency than type of family structure, socioeconomic status, verbal IQ, family size, or birth order. Maltreatment was the third most important variable in property crime and misbehavior categories, but in both instances maltreatment was significantly related. Even though the effects of maltreatment were small in terms of variance explained, when averaged across violent, property, and misbehavior categories, maltreatment was the most powerful predictor of overall delinquency. 44 references, 2 notes, and 3 tables