Background: Maternal near-miss is defined as a woman who almost died but survived a serious maternal complication during pregnancy, childbirth, or within 42 days of completion of pregnancy. All the mothers and their partners experience some unpleasant long-term consequences of their near-miss event assumed to be directly or indirectly related to difficult obstetric events, these morbidities include conditions, such as uterine prolapse, stress incontinence, perineal tears, urinary tract infections, severe anemia, depression and fistula. Studying maternal near miss morbidity cases are increasingly recognized as useful means to examine quality of obstetric care. Nevertheless, routine implementation and wider application of this concept in reviewing clinical care has been limited due to the lack of a standard definition and uniform case-identification criteria. In Ethiopia little was known about Maternal Near Miss and factors that affect. Therefore, this study sheds light on causes of Maternal Near Miss and can contribute to the design of interventions to minimize pregnancy-related complications. Objective: To assess maternal near miss and associated factors among mothers who gave birth in Bahir Dar city public hospitals, Bahir Dar, Northwest, Ethiopia, 2021. Methods: institutional based cross-sectional study was conducted in three selected public hospitals from September –October 2021. The sample includes 832 selected participants with systematic random sampling techniques. The collected data was entered into a computer using EPI data version 3.1 and analyzed by using Spss version 25.0. A multi-co linearity test was done. Hosmer-Lemeshow goodness of fit test was carried out to ensure whether the data were conflicted with assumptions made by the model or not. Variable having P value of less than 0.05 was considered statistically significant. Result; there were 2,311 live births, 211 MNM cases and 399 MNM events. Medical disorders [AOR=10.659; 95% CI: 6.731, 16.88], educational status of the mother [AOR =2.034; 95%CI: 1.171, 3.534] and time to reach health facility [AOR =1.892; 95%CI: 1.111, 3.220] were identified as significantly determinants of maternal near miss. The underlying causes were hypertensive disorders (17%), sepsis (7.6%) and sever anemia (6.6%). Conclusion; in this study the proportion of maternal near misses was found to be high compared to magnitudes in other parts of Ethiopia. Pre-existing medical disorder of the mother was proved to be a major determinant of MNM. So, expanding education, increasing road and health facility access and also detection and treatment of chronic medical illness prior to pregnancy will all help reduce MNM. Key word; Maternal near miss, Associated factor, Bahir Dar, Ethiopia.