As part of an evaluation of the Gang Reduction and Youth Development (GRYD) program, the Urban Institute and Harder+Company Community Research documented activities for 12 GRYD zones and developed a profile for each zone. These zone profiles cover the period from initial contracts (2008/2009) to mid-2010 and are intended to complement a separate report, Evaluation of the Los Angeles Gang Reduction and Youth Development Program: Y1 Report. The profiles provide background information on relevant geographic features of the zone; present information on zone demographics; summarize what is known about gang activity in the zone; and report on the prevention, intervention, and crisis intervention components of GRYD.