This thesis investigated and statistically analyzed the responses of delinquent and non-delinquent female adolescent subjects to J. B. Rotter's Internal-External Locus of Control Scale. Internal control refers to the perception of positive and/or negative events as being a consequence of one's own actions and under personal control. External control refers to the perception of positive and/or negative events as being unrelated to one's own behaviors and beyond personal control.Delinquent subjects were obtained through a juvenile court. Non-delinquent subjects were obtained from schools and social agencies. Variables of age, race, socio-economic level and number of parents in the home were controlled.Delinquent females were found to be significantly more external than the non-delinquent females. Race was not found to be significant for the total sample, but the black non-delinquent females scored significantly more external than did the white non-delinquent females.