Objective: To establish point and one-year prevalence data regarding partner violence (PV) for women presenting to a university teaching hospital, University of California, Irvine Medical Center (UCIMC), one of 15 emergency departments in Orange County, and to determine differences in partner violence rates when comparing descriptive variables such as race, income and education. Methods: An anonymous, written survey was administered to a convenience sample of 370 women presenting to University of California Irvine Emergency Department over a 12 month period. Results: Partner violence has a point prevalence of 6.7% and a one-year prevalence of 37.0%. Women who have experienced previous abuse are more likely to present with complaints related to PV acutely. Lower income levels correlate with a higher incidence of physical, emotional, and sexual abuse. We found no correlation between race and likelihood of PV. Conclusion: PV in Orange County, California occurs quite frequently. The oneyear prevalence compares to that of the entire state of California, but is at the higher limit when other areas are compared. Detection rates among EPs should be improved, and services to women who have suffered PV will need to be enhanced within Orange County.