Introduction: Intimate partner violence (IPV) is a pervasive global issue that severely affects the physical and mental health of abused women. This is particularly evident in its association with post-traumatic stress disorder (PTSD). Despite limited domestic research on this topic, recent data offers an opportunity for a comprehensive analysis to understand the prevalence of PTSD among women exposed to IPV in Taiwan. Purpose: This study aims to estimate the prevalence of PTSD in this population and to explore the associated risk factors. Methods: This is a cross-sectional study involved a sample of 291 women aged 20 to 65 who have experienced IPV. All participants completed questionnaires, including Intimate partner violence questionnaire and the Posttraumatic Diagnostic Scale for DSM-5 (PDS-5). Results: Data analysis using t-tests, chi-square tests, and odds ratios revealed the following findings: (1) The estimated prevalence of PTSD among women experiencing IPV in Taiwan ranged from approximately 49% to 57%; (2) Among pretraumatic factors, poorer economic status and shorter duration of marriage/cohabitation were significantly associated with higher rates of PTSD diagnoses; (3) Among peritraumatic factors, physical, psychological, and sexual violence were all significantly associated with higher rates of PTSD diagnoses, with sexual violence demonstrating the strongest association overall; (4) Among posttraumatic factors, women with help-seeking experiences were significantly more likely to be diagnosed with PTSD. Conclusion: This study highlights the high prevalence of PTSD among women exposed to IPV in Taiwan and provides valuable insights for mental health professionals and researchers. It emphasizes the critical impact of various forms and contexts of violence on the risk of developing PTSD, thereby enhancing the identification of these scenarios and improving support systems and assistance for affected individuals.