Studies of the effects of parental occupation on offspring's vocational aspiration or choice have shown that family variables contribute to the development of occupational personality types. To investigate the congruence between parent and offspring Holland occupational personality type codes, and to assess the variations of this congruence across three ethnic groups, 51 Black, 57 White, and 48 Mexican American college students completed a questionnaire about themselves and their parents. Parental occupation and offspring major were coded according to one of Holland's six personality types, i.e., realistic, investigative, artistic, social, enterprising, or conventional. An analysis of the results showed that no statistically significant differences existed across the three groups with respect to parent and offspring Holland codes. If these findings can be replicated in larger samples using more powerful measures of Holland type, then it may be possible to conclude that the developmental principles which create a vocational personality in childhood may proceed without regard to ethnic identification (at least for the three ethnic groups sampled in the present investigation). (BL)