The Study focuses on the socio- economic and demographic determinants of first maritalrndi sruption among women in Arada Sub-C ity. The study is initiated with the objective ofrnidentifying the major divorce or separa tion causes and critica lly exam ining the soc io-economicrnand demographic variables in the variation of these contributory facto rs. It is hypothesized thatrnmarital di sru ption would be higher for marriage perfo rmed at early age and at lower educationrnlevel, for couples with no children , for marriage entered with out one's consent and for earlyrnduration of marriage.rnThe study used ma inly primary data generated through conducting a household sample surveyrnwith structured questionnaire to collect the required information. An in-depth interview was alsornused to substanti ate and cross check the information obtained from the structu red questionnaire.rnThe units of analysis for this study are ever-married women (excluding widowed for firstrnmarriage) who are residing in Arada Sub City, Add is Ababa. The sampling procedure followed arnmultistage sampling tech nique in which selected Kebeles were divided in to the manageablernenumeration areas so that household listing would be made in order to identity the targetrnpopulation. The dependent variab le (fi rst marriage in stab ility) is composed of categories ofrnmarriage disruptions due to divorce or separation and the comparative categories of intactrnmarriage. Some of the methods of ana lys is that were used in thi s study include uni-variate, bivariaternand multi-variate techniques of logistic regression analysis.rnThe results of logi stic regression analysis revealed that early age at first marriage has a significantrnand negative relationship with first marriage disruption. Duration of first marriage also showedrninverse relationship with the chance of marital disruption. The probability of marital disr uption isrnhigher for early durations than the late durations of marriages. Working women were high lyrnrelated to the odds of being divorced or separated than the non-working one. Marriage made byrnown choice and consent reduced the odds of marriage disruption as compared to arrangedrnmarriages. The ed ucation level had a signi fica nt and negative re lationship with the chance ofrnmarital disruption.rnIt is recommended that governmental and other concerned bodies des ign methods through whichrnthe most significant variables that highly determine the stability of first marriage will be broughtrnto atte ntion and thus the impact of marital di sruption would be lessened in the fa mily and in thernsociety at large.