This study created an alcohol use problem severity taxonomy and examined its association to engagement in other problem behaviors. Minnesota youths were categorized based on their frequency of alcohol use and DSM-IV alcohol abuse and dependence criteria. Greater alcohol use problem severity was generally associated with higher prevalence of lifetime and regular marijuana use and higher odds of lifetime sexual intercourse and past-year arrest/law trouble. Knowing about variations in adolescent alcohol use and problems may be instrumental in gauging the degree to which youths may also be engaging in a range of other problem behaviors. (Contains 2 tables.)