Several studies have shown that sexual assault may lead to psychiatric problems such as depression, fear or anxiety, substance abuse, or sexual distress. As part of an epidemiologic survey to determine base rates of mental disorder in a Los Angeles household population, 3,132 respondents were surveyed about their sexual assault experiences and use of services for mental health reasons. Using a two-stage probability sampling technique, male and female adults were selected from two mental health catchment areas, one comprised primarily of Hispanics and one primarily of non-Hispanic Whites. Respondents reported their lifetime use of general medical services (e.g., non-psychiatric medical doctor, hospital emergency room), specialty mental health services (e.g., psychiatrist, social worker), and human services (e.g., clergy, crisis center). Almost one-quarter of the assaulted respondents (weighted) reported using general medical services compared to less than 9% of the nonassaulted respondents. Weighted percentages among assaulted compared to nonassaulted respondents were about three times higher for use of specialty mental health services (42% versus 14%) and human services (37% versus 11%). These findings are consistent across gender, age, ethnicity and DIS/Diagnostic and Statistical Manual of Mental Disorders-III (DIS/DSM-III) disorder, with use of mental health services more dramatically associated with sexual assault among those with versus without a DIS/DSM-III disorder. (Author/NB)