Negative social reactions are common responses to disclosures of sexual assault. A study was undertaken to evaluate the psychometric characteristics of a new measure of social reactions to sexual assault victims, the Social Reactions Questionnaire (SRQ). Good reliability and validity were demonstrated for the measure in three samples of sexual assault victims: community volunteers, college students, and victims contacting mental health agencies. The SRQ provides a much needed measure of both the positive forms of social support and several negative social reactions received by sexual assault victims disclosing their assaults to a range of informal social network members and formal support providers.