Background: Sexual victimization is a major public health, judicial and societal concern worldwide. Prevalence studies on sexual victimization have mostly focused on female and student samples. Overall, nationally representative and comparable studies are still lacking. Methods: We applied a broad definition of sexual violence, including hands-off and hands-on victimization, and behaviorally specific questions to assess sexual victimization. Prevalence estimates were obtained after weighting the sample according to the population proportions of men and women in three age groups. The data provide nationally representative lifetime and 12-month prevalence estimates. We further conducted logistic regression to estimate adjusted odds ratios to examine the relationship between demographic, socioeconomic, and sexuality-related variables with the likelihood of being victimized. Results: These estimates indicate that 64.1% (95% CI: 61.9-66.1) of the general population in Belgium experienced some form of sexual victimization in their lives, and 44.1% (95% CI: 41.9-46.2) experienced some form of sexual victimization in the past 12 months. Logistic regression analysis shows that women are more than five times more likely to be victimized in their lifetimes than men (aOR = 4.96, 95% CI: 4.02-6.14), with an overall prevalence estimate of 80.8% (95% CI: 78.3-83.1). Young adults between 16 and 24 years are twice as likely to be victimized in their lifetimes (aOR = 2.13, 95% CI: 1.36-3.35) and more than three times more likely in the past 12 months (aOR = 3.52, 95% CI: 2.82-4.18) compared to adults aged 50 to 69 years. Prevalence estimates for all forms of sexual victimization are presented and compared to other national and international studies on sexual victimization. Conclusion: This comparison suggests that prevalence rates have been underestimated . The prevalence estimates obtained in this study demonstrate that all sexes and ages are affected by sexual victimization.