This paper focused on comparing the personality profile and inventory of athletic and non-athletic female and male high school students in Tehran in order to see if the personality traits of these students stemmed from their gender. The sample included 260 high school students randomly selected in Tehran (130 girls and 130 boys, with 65 athletes and 65 non-athletes in each group). Gordon's personality questionnaire with the desired validity was used in the study. The questionnaire had eight variables (ascendancy, responsibility, sociability, emotional stability, cautiousness, original thinking, personal relations, and vigor). To answer the research hypothesis, MANOVA's multivariate variance analysis was used, yielding the following results: athletes scored high in all eight research areas except for cautiousness, while non-athletes scored low in all these areas. Athletic male students scored higher in sociability and cautiousness, while athletic female students ranked higher in emotional stability, original thinking, vigor, and ascendancy. As far as responsibility is concerned, there was not a significant relationship between athletics and gender. In general, students scored highest in ascendancy but lowest in personal relations. Overall, male athletes ranked first in cautiousness and personal relations, while female athletes ranked first in all other six areas.