This study was conducted to discover differences in personality characteristics among student leaders. The personality characteristics of presidents of campus organizations affiliated with one of four distinguishable student subcultures, identified by previous research as vocational, academic, collegiate, and nonconformist, were measured by the Stern Activities Index. The index contains items to measure 12 factors of personality: self-assertion, audacity-timidity, intellectual interests, motivation, applied interests, orderliness, closeness, submissiveness, sensuousness, friendliness, expressiveness-constraint, and egoism-diffidence. Student leaders of the nonconformist subculture groups were omitted from the analysis because of the low frequency of response. Comparisons among the remaining groups were made for each of the factor means by the use of "t" tests. The significant differences found among the leaders were: (1) collegiate leaders scored higher on closeness and friendliness than the vocational or academic leaders; (2) on expressiveness-restraint, collegiate leaders scored higher than vocational leaders; (3) vocational leaders scored higher on applied interest than academic leaders; and, (4) academic leaders scored higher on motivation than collegiate leaders. It was concluded that the results of the research support the theory that student leaders possess different personality characteristics, depending on their particular reference group. (MB)