The purpose of this study was to investigate developmental differences of career awareness and the relationships between career awareness and identity styles. Participants were 255 tenth-graders, 221 eleventh-graders, 228 twelfth-graders, and 195 undergraduates. They completed the Career Awareness Scale for career maturity to measure four areas of career awareness; interpersonal relationship, information utilization, future planning, and decision-making. They also completed the Identity Style Inventory to measure two identity styles; informational and diffuse/avoidant. Developmental differences of career awareness were significant but not noteworthy. Eight canonical correlation analyses indicated that the four areas of career awareness were positively related to informational style and negatively related to diffuse/avoidant style. These results suggest that acquisition of abilities and attitudes necessary for resolving career developmental tasks facilitate vocational identity formation among late adolescents.