The Sexual Abuse History Questionnaire (SAHQ), a widely used screening tool for childhood sexual abuse (CSA) and adolescent/adult sexual assault (AASA) experiences, has limited examination of its psychometric properties in diverse populations. Our study assessed the SAHQ's psychometric properties (i.e., structural validity and measurement invariance across demographic groups, know-group validity, and internal consistency) and estimated the frequencies of various types of sexual victimization across 42 countries and in diverse gender-, trans-status-, and sexual-identity-based groups that were previously missing from measurement-focused studies. We used a large, non-representative sample (