We examined sex, socioeconomic status (SES), classism, modern sexism, and locus of control as uniquely contributing factors to college students’ career decision self-efficacy. A total of 139 college students participated in the survey, and the hypothesis was tested with hierarchical regression. Results revealed that (a) sex and SES do not significantly contribute to classism and modern sexism to college students’ career decision self-efficacy and (b) classism and modern sexism, internality and luck uniquely contributed to college students’ career decision self-efficacy above and beyond the variances accounted for sex and SES. Results indicate the importance of classism and modern sexism over actual sex and SES in predicting college students’ career decision self-efficacy.