Adult and community support may protect against sexual experience among immigrant youth, but it remains unknown whether this support confers protection equally across immigrant generations. Drawing on data from 852 race/ethnically diverse low-income youth recruited from Boys & Girls Clubs, we used mixed effect logistic regression models to examine associations between adult and community support and sexual experience and tested interactions to examine whether adult or community support influenced sexual experience differently across immigrant generations. As adult support increased, the odds of sexual experience decreased. However, adult support increased the odds of sexual experience for first-generation youth and decreased the odds in the second and third generations. Greater community support reduced the odds of sexual experience across all immigrant generations. Thus, adult support may not confer equal protection across all immigrant generations, suggesting youth of different immigrant generations have different needs.