Compared to whites, 12-month odds of cannabis use disorders were higher in Native Americans and Blacks, but lower in Asian/Pacific Islanders and Hispanics. By severity, 12-month odds were higher in blacks than whites at moderate and severe levels (OR=1.7–2.0), and lower in Asians/Pacific Islanders and Hispanics at low severity. Blacks did not differ from whites on odds of lifetime cannabis use disorder, but Asians/Pacific Islanders and Hispanics had lower odds than whites overall and across severity levels (OR=0.3–0.5).