Purpose: We aimed to evaluate the factors associated with intimate partner violence (IPV) against reproductive-age women in Peru. Methods: Secondary analysis of the ENDES 2015–2017. ENDES is a multi-stage survey with a probabilistic sampling design for the urban and rural areas of the 25 regions of Peru. A total of 62,870 women of reproductive age (15–49 years) were included. IPV was defined as any report of violence (physical, psychological or sexual) committed by the last partner of the women. Categorical variables were described using absolute frequencies and weighted proportions. We used generalized linear models with Poisson family and log link function to calculate prevalence ratios (PR) for the associated factors with their respective 95% confidence intervals. Results: The overall IPV was 38.7%. The prevalence of sexual, psychological and physical IPV was 6.9%, 26.8%, and 31.2%, respectively. The frequency of any IPV was lower in younger women, those living with their intimate partners or married, and those living in a coastal region different from Lima. IPV was more frequent among women with a low educational level, or with a partner with low educational level, with children, with a partner with alcohol habit, in women with a history of violence by the father against the mother and living in the highlands or the jungle. Conclusions: In Peru, IPV affects nearly four in ten women (physical and psychological types were the most frequent). The factors associated with IPV can be useful markers to identify the most vulnerable groups for implementing interventions intended to decrease the prevalence of IPV.