Background: Trauma, especially head trauma, is an expanding major public health problem andrnthe leading cause of death of the young and productive part of the world’s population.rnObjective: To assess the magnitude and outcomes of head injury among patients presented tornadult emergency department of Myungsung Christian medical center, from January 01, 2016 tornJanuary 01, 2017, Addis Ababa Ethiopia.rnMethods: Institutional based retrospective, cross sectional study was conducted at MyungsungrnChristian medical center, from January 01, 2016 to January 01, 2017, Addis Ababa Ethiopia.rnAll head injury patients who fulfills inclusion criteria and visited Myungsung Christian medicalrncenter during the period from January 01, 2016 to January 01, 2017 were selected for the study.rnResult. From total of 673 trauma patients visited adult emergency of MCM hospital fromrnJanuary 12016 to January 1, 2017, there were 168 head injury patients and included in thisrnstudy of which 124 (73.8%) were males and 44(26.2%) were females. From the 168 head injuryrnpatients, severity of head injury was categorized depending on GCS and 11(6.4%) severe, 73rn(43.5%) moderate and 84(50%) were mild type of head injury. Road traffic accident was thernleading 59(43.3%) followed by fall down accident 49(35.8%) and assault or fighting measuresrnfor 29(21.2%) of head injury patients. The majority of the patients 99(58.8%) were improved,rn28(16.7%) cured, 7(4.2%) died and 34(20.2%) were with unknown outcome because they werernreferred to other hospitals.rnConclusion: the analysis of this study revealed that road traffic accident is the major cause ofrnhead injury and head injury patient with associated injury are more at risk to developrncomplications than with no associative injury.rnKey words: head injury, magnitude, outcomes, retrospective, Myungsung Christian medicalrncenter.