Latent class analysis was used to examine the career preparation of 5,227 11th-grade Korean adolescents taken from the Korean Education Longitudinal Study of 2005 (KELS:2005). Three career preparedness groups were identified, to reflecting Skorikov's ("J Vocat Behav" 70:8-24, 2007) conceptualization of career preparedness: prepared, confused, and unprepared. Most individual, family, and school factors selected for study were statistically significant predictors of group membership. Results provided insight about career decidedness and career planning from a Korean context.