As part of a campus-wide prevention program, the Pontificia Universidad Catolica de Chile (PUC) implemented a cross-sequential survey on sexual violence. In this article, we report data from the first wave (2018; N = 2,046) from three cohorts of undergraduates (Year 1, n = 792; Year 2, n = 601; Year 3, n = 653). We found an overall twelve-month prevalence for victimization experiences of 18.7 percent (4.3 percent by force or threat of force; 12.9 percent while unable to resist; 7.1 percent by verbal pressure; multiple responses allowed). Women (22.9 per cent) were victimized more frequently than men (9.7 percent). Among women, victimization rates were highest for Year 1 students (25.7 percent), intermediate for Year 2 (22.3%), and lowest for Year 3 (19.8 percent). Only 10.9 percent of reported incidents happened in a university context. In most cases, perpetrators were male (88.9 per cent) and known to the victim (72.1 percent); 24.4 percent were partners, 35.5 percent were friends. We present additional data on risk factors and attitudinal correlates. We also discuss our findings in relation to previous research suggesting higher prevalence rates at Chilean universities, considering differences in methodology and implications for future research.