The present study extended the research on the mental health of lesbian, gay, and bisexual (LGB) youth by testing the relationship of social support, social connectedness, and collective self-esteem to psychological well-being in a sample of 218 LGB youth. Perceived social support significantly predicted psychological well-being subscales; social connectedness and collective self-esteem contributed significantly to the psychological well-being of the LGB participants when controlling for perceived social support. Age moderated the relations between several of the social and psychological well-being variables. Results of the study suggest that helping professionals working with LGB youth consider assessment of the youth's sense of connectedness to those around him/her and esteem related to LGB group membership in addition to assessing general social support.