Abstract Background: Postnatalcareutilizationis the most neglected care in Ethiopian,despite a large proportion of maternal and neonatal deaths occurs during postnatal period. Evidence suggested that utilization of postnatal care averts major complications of the fetus and mother.But,proportion of rular women utilization of postnatal care is low in Ethiopia. Information about prevalence and factors which determine utilization of postnatal care utlization in rular women in Ethiopia is mandatory for policy making, and program design to enhance its utilization. Objective: Theobjective of this study was to determine the prevalence of utilization of postnatal care and to identify its determinant factorsamong rural women who gave birth in the past five yearsbefore Ethiopian demographic health survey, in 2016. Method: This study utilized data from Ethiopian demographic health survey2016 for analysis. It is a national two stage, cross sectional study. It analyzed data for rural women who gave birth at least one time in the past five year before data survey time. Logistic regression was applied to identify explanatory variables associated with outcome variable. Adjusted odds ratio with 95% confidence interval was computed and P-value< 0.05 was considered as statistically significant. Result:The prevalenceof postnatal care utilizationamong rural women was 11.4%.Place of delivery[AOR=4.3, 95%CI, 1.4-5.2], ANCvisit [AOR=2.1, 95%CI, 1.1-3.9] and Women in the richest wealth quintile [AOR=2.97, 95%CI, 1.9-4.5] were factors associated with postnatal care service utilization among rural women in Ethiopia in 2016. Conclusion and recommendation: This study showed that prevalence of postnatal care utlization was low. Being in richest wealth quintile, history of ANC vist and place of delivery were positive predictors of postnatal care utlization among rural women. Regardless of proven strategies utilized to maximize utilization of postnatal care utlization by the government of Ethiopia, this study showed that prevalence is low in rural areas. Therefore, community awareness creation, increasing institutional coverage by expanding maternity waiting area and besides, the government should design and implement income increasing package among rural women.