There is considerable diversity in the literature regarding age and gender differences on career maturity and career decision status. There is also a dearth of data on high school samples. The present study reports cross-sectional data from 1,971 Australian adolescents, ages 12.51-17.99 years, who completed the Career Decision Scale (S. H. Osipow, C. G. Carney, J. Winer, B. Yanico, & M. Koschier, 1976) and the Career Development Inventory (Australian; J. Lokan, 1984). Results illustrated a developmental progression in career maturity, although a less uniform pattern emerged with gender differences. Findings regarding career indecision also presented a complex picture and highlight the need to focus on other demographic and contextual factors.