A total of 103 high school juniors completed the Keane PTSD Scale, the Civilian Mississippi Scale for PTSD, and a demographic questionnaire was completed by 97 high school juniors; 29 percent of the latter group indicated clinical levels of PTSD symptomatology. Comparisons of incidence were made with regard to gender, ethnicity, family constellation, self-reported exposure to violence, self-reported exposure to trauma, and incidence of violent crime in the vicinity of school attendance. Results revealed that minority males were exposed in their neighborhoods and schools to more violent crime than were any other group. A gender effect in response to violent crime was evident. In the school with the highest rates of murder, assault, and individual robbery, boys achieved low to mid-range PTSD scores, and girls obtained the highest PTSD scores, indicating that girls may react to violence with more symptoms of PTSD than boys. 47 references