Adolescent women (n=1,025) in grades 7 through 12 in a stratified random sample of Alberta high schools completed measures of emotional problems and suicidal behavior in the past 6 months, and of frequency and type of sexual assault (including sexual harassment) experienced in school. Twenty-three percent had experienced at least one event of assault (sexual touching, sexual threats or remarks, or an incident of indecent exposure); 4 percent had "often" experienced one or more of these assaults or harassments. Those experiencing a high number of sexual assaults or harassments were significantly more likely to have clinical profiles on the measures of emotional disorder; 15 percent of 38 women experiencing frequent, unwanted sexual touching had "often" made suicidal gestures or attempts in the previous 6 months, compared to 2 percent of 824 women with no experience of sexual assault. Tables, references