The aim of this study was to determine the type and frequency of online sexual practices among Spanish college students, the prevalence of risk and pathological cybersex use profiles, and the correlates/predictors of this behavior. Participants were 1,557 males and females between 18 and 25 years old. Results showed that cybersex use is not as frequent as that documented in other Western countries. However, a significant percentage of participants with a risky (8.6%) or pathological (1.7% in men and 0.1% in women) profile was identified. Finally, we found a set of variables that, in interaction with gender, explains 58% of the variance for cybersex addiction scores.