Introduction: The aim of this study was to investigate the career decision-making self-efficacy in a sample of 356 Turkish undergraduate students. Method: With this purpose, 356 (138 females; 218 males) Turkish undergraduate students aged 17-24 completed a Turkish-translated version of Career Decision Self-Efficacy Scale-Short Form (CDSE-SF) to evaluate their career decision self-efficacy. Means and standard deviations were given to examine perceived difficulty of career decision-making tasks arranged from most to least difficult. T-test analyses were conducted to test for age, gender, and major differences on career decision self-efficacy scores. Results: Results demonstrated that the most difficult tasks were on problem solving subscales and the least difficult tasks were on self-appraisal and occupational information subscales. According to the results of t-tests, the older group (21 and over) scored significantly higher on goal selection, planning, self-appraisal, and occupational information subscales than younger group (20 and below). No gender differences were found in any subscales of career decision self-efficacy scale. According to major, students from engineering departments (Mechanical, Chemical, Geological, Environmental, Electrical & Electronic, Geodesy & Photogrammetry) scored significantly higher on goal selection, self-appraisal, and occupational information subscales than the students from social departments (Economy, Management, International Relations). Discussion and conclusions: The results suggested that career-decision self-efficacy scores of Turkish undergraduate students are similar to the previous research conducted mostly in English-speaking countries. These findings can be a support for the use of CDSES-SF with Turkish undergraduates and a support of its use in other non-English-speaking countries. Future research is encouraged to further explore such task difficulty, gender, age, and major differences using CDSES-SF with various populations in other non-English-speaking countries. (Contains 3 tables.)