Objective: Social settings and situations of underage drinking were de
scribed for students from 15 communities in Minnesota and Wisconsin. R
eports of their last drinking event, including setting, number of pers
ons drinking with them, number of those persons under age 21, and whom
they were with, were examined. The role of these variables in the pre
diction of having five or more drinks on one occasion was assessed. Me
thod: Ninth graders (n = 2,269) and 12th graders (n = 2,377) who repor
ted using alcohol in the last 30 days were included in the sample from
a nested cross-sectional survey design. Bivariate analyses were perfo
rmed between the situational variables and gender, number of older sib
lings and drinking behavior. Chi-square statistics were divided by an
estimate of the design effect and multivariate analyses used mixed-mod
el regression to correct for the nesting of individuals within communi
ties. Results: Situations and settings of drinking differed according
to age and drinking behavior. Twelfth graders were less likely to drin
k with parents or other adults than 9th graders and more Likely to dri
nk in someone else's home, and in large groups where nearly everyone w
as underage. Persons reporting having five or more drinks on one occas
ion in the last 2 weeks were more likely to report drinking with peers
, in large groups of underage persons and away from home. Conclusions:
Interventions to reduce use of alcohol by youth must focus on the con
text in which the drinking is taking place in addition to other factor
s. Policy or educational interventions that seek to alter the situatio
ns and settings of underage drinking may be effective in reducing cons
umption of alcohol in adolescents.