The purpose of this study was to examine the relationships of vocational outcome expectation to social support which is an environmental factor and locus of control which is a personal factor. With this purpose, using Social Cognitive Career Theory as the theoretical framework, 263 undergraduate students completed Vocational Outcome Expectations Scale, Multidimensional Scale of Perceived Social Support, and Rotter's Locus of Control Scale. Results indicated that perceived social support from family, friends and significant others were positively and locus of control were negatively associated with vocational outcome expectations. The results also indicated that within the perceived social support dimensions, family support was the unique significant predictor of vocational outcome expectation. Locus of control significantly predicted vocational outcome expectation scores as well. In the light of these findings, suggestions that interventions targeting to increase vocational outcome expectations of students had better take the family support into consideration and include exercises for families were emphasized and ideas for future research are discussed.