A substantial body of evidence has examined developmental pathways into and out of conduct problems. However, there is a dearth of research examining whether the same conduct problem pathways are evident in minority ethnic, as in white, populations. Drawing on the UK Millennium Cohort Study (MCS), a nationally representative longitudinal study of children born between 2000 and 2002, this study examines differences in group-based trajectories of conduct problems according to broad categories of ethnicity. Using pathways identified in a prior study (n = 17,206, 49% female, 18% ethnic minority), including persistently high (8%), childhood-limited (23%), adolescent-onset (13%), and low (56%), significant ethnic differences were found. As a result, trajectories of conduct problems were identified separately for Asian, black, mixed ethnicity, and white children. For Asian, black, and mixed ethnicity children, three trajectories were identified: persistently high, childhood-limited, and low, but not adolescent-onset. Although these pathways have similar labels, their patterns and shapes seem to differ among the three ethnic groups. For white children, the same four trajectory groups were identified as in the prior study. Risk factors also differed among the groups according to ethnicity, although a worse child-parent relationship was a significant predictor of the higher problem trajectories for all ethnic groups. Overall, the findings suggest that black and minority ethnic children may follow different developmental pathways of conduct problems than white children, particularly during adolescence, having implications for service use and early intervention.