Under-five child mortality level can be used for strategic and national planning as well asrna measure of socio-economic indicators like the quality of health care, nutrition, familyrnplanning, practice and usage. The story of child survival over the past two decades is onernof significant progress and unfinished business. In Ethiopia a significant reduction ofrnunder-five child mortality was observed in the last decade though there is much to do tornachieve the desire goal. This study aimed to identity the important socio-economic andrndemographic determinants of under-five child mortality using EDl-fS 20 II data.rnDescl'iptive analysis, cross-tabulation analysis, logistic regression analysis and multilevelrnregression analysis were used for data analysis. It was found that 7.24 % of under-fivernchildren could not survive among chi ldren born within five years. Months of breastrnfeeding, mothers' educational level and total children everborn were important factorsrnthat affect under-five child mortality. Similarly birth order number of 4-6 and 7-9,rnnumber of household members of 6-10 and 11-15 significantly affected under-fivernmortality. The regions Afar, Amhara, Oromia, Benishangul-Gumuz, SNNP and Gambelarnwere affected most. Children born to mothers of age group 15-19 and 20-24 years werernsignifi cantly affected based on logistic regression model analysis. The same is true forrnmultilevel regression except that region was a significant random effect. It isrnrecommended that mothers should breast feed their chi ldren for at least 6 months;rnfemales education enrolment should increase; mothers should give small number ofrnbirths; mothers should not give birth in their early age; and regions should be consideredrnwhile formulating policy to reduce under-five child mortality.