Background: Exposure to blood and body fluids causes major health hazards and serious concerns among health care professionals in their work settings. The prevalence of exposure to blood and body fluids is increasing, particularly for nurses who work in the emergency unit. The study aimed to assess the prevalence of occupational exposure to blood and body fluids, and its associated factors among nurses in public hospitals in the emergency department and intensive care unit, in Addis Ababa, Ethiopia.Methods: A cross-sectional study was conducted from March 18, 2021, to April 20, 2021. Simple random sampling was used to select the studies in public hospitals. Semi-structured self-administer questioners were used to collect the data and analysis using SPSS version 25. Logistic regression model was used to identify the factors associated with exposure to blood and body fluids.Results: About 198 (0.76 with 95% CI: 0.71, 0.81) had been exposed to blood and body fluids in their professional lifetime, and 167 (0.64 with 95% CI: 0.58, 0.70) were exposed to blood and body fluids in the last 12 months. Being male (AOR = 2.88, 95% CI: 1.35, 6.12), a lack of access to handwashing facilities (AOR = 5.02, 95% CI: 3.73, 14.51), not wearing a face shield and apron (AOR = 6.21, 95% CI: 2.39, 9.55), and a lack of personal protective equipment (AOR = 5.53, 95% CI: 1.87, 10.38) were all found to be significantly associated with exposure to blood and body fluids.Conclusion: As a result of the lack of personal protective equipment, the majority of nurses did not consistently wear an apron and face shield while providing patient care, putting them at a higher risk of acquiring blood-borne pathogens.