The purpose of the present study was to assess the relationship of history of gang involvement to engagement in Therapeutic Community (TC) treatment. Residents (N = 222) at two Daytop facilities completed a survey assessing sociodemographic characteristics, prior gang involvement and multiple aspects of TC functioning. Residents with prior gang involvement (21%) were younger and less educated than those without prior gang involvement. Although gang involved residents were more likely to achieve a high work role status in the program they scored lower on multiple indicators of engagement in treatment including acceptance of Daytop philosophy and TC clinical progress. (Contains 1 table.)