<p>A recent line of studies has argued that the age-crime curve varies by crime type, across different cultural contexts, time periods, and cohorts of individuals. Accordingly, this study examines the age-crime relationship by decomposing age, cohort, and period effects using data from Korea. The results indicate that the peaks of the age-crime curves for sexual offence and theft occur in the late teens and early twenties, whereas the curves for assault and fraud offence in the thirties. Cohort and period effects also show significant and distinct relationships with the age-crime curves. This study supports findings from other age-period-cohort analyses in South Korea; however, more context-oriented explanations and analyses are needed to understand the variations in age-crime distributions.</p>