Background: Ethiopia witnessed an unprecedented decline in under-5 mortality from 166 perrn1000 in 2000 to 88 per 1000 live births in 2011; an average decline of 47%. But still today,rnapproximately 42% of mortality in Ethiopia attributes to high neonatal deaths; which needsrnfurther action like implementing SDG.rnObjective: To assess preventable causes and factors associated with neonatal mortality amongrnneonates admitted to NICUs of Addis Ababa Governmental Hospitals from 2011-15GC.rnMethods and materials: Facility based retrospective study was conducted at NICUs of publicrnhospitals in Addis Ababa using secondary data of neonatal mortality among neonates admitted inrnNeonatal Intensive Care Units from 2011-2015 GC. The sampling has two stages and the overallrndesign effect of 1.5 was considered. Data was collected using the data extraction checklist afterrnconducting pre-test. Then the collected data was coded and entered in to Epi data of version 3.1rnand exported to SPSS for windows version 21.0 for cleaning, editing, and analysis. Binary andrnmultiple logistic regressions have been used to observe the association between independentrnvariables and dependent variable.rnResult: The study included 561 neonates died after admission to NICUs in Addis AbabarnGovernmental Hospitals and data was collected for different variables of interest like obstetricsrnand gynecologic related, medical problems on admission including time of death to findrnsignificant association with neonatal mortality. The likely of dying from sepsis(recorded cause ofrndeath) within 7-28 days was 1.8 times more likely as compared to likely of dying within firstrnweek of life (AOR=1.81, 95% CI: 1.119-2.934, P=0.016). In the same way, The likely of dyingrnfrom hypothermia within 7-28 days was 1.68 times more likely as compared to likely of dyingrnwithin first week of life (AOR=1.68, 95%, CI: 1.054-2.67, p=0.029)rnConclusion and Recommendation: In general, the study has found significant association ofrnneonatal mortality with hypothermia and sepsis which are both potentially preventable. Thernconcerned bodies are then recommended to focus on general respective preventive mechanisms.rnKey words: Neonatal Mortality, Perinatal Mortality, Causes of Death in NICUs.