Background: World Health Organization (WHO) estimates that 42 million abortions take placernevery year around the world. Approximately 95% of unsafe abortions take place in poor countries,rnwhere access to family-planning services is limited. Unsafe abortion accounted for 17% of allrnmaternal deaths in Eastern Africa. In Ethiopia 500,000 women suffer disabilities related tornpregnancy and child health due to unsafe abortion related reasons. In Addis Ababa, unsafe abortionrnaccounts for almost 54% percent of maternal mortality.rnObjective: This study aimed to examine different socio-cultural, economic and demographicrnfactors that are associated with their knowledge, attitude and practice of abortion.rnMethodology: By applying multistage sampling method , 430 Addis Ababa reproductive agernwomen were interviewed from five randomly selected health facilities which providernComprehensive Abortion Care. Representative from three types of health providers (Government,rnprivate and NGO owned) were also interviewed in depth. Descriptive, Chi-square and multivariaternanalysis were done to figure out factors associated with their knowledge, a attitude and practice ofrnabortion.rnResult: Only 44% of the interviewed women can state the correct circumstances where abortion isrnpermissible under Ethiopian abortion law. In terms of attitude 54 % of them are against the idea ofrnabortion practice and 41 % of them do not agree on legality of abortion. Respondent's religiousrnaffiliation indicates an association with respondent's attitude towards legality of abortion.rnFrom the 414 ever pregnant women 65% of them have had abortion practice in their life time. Ofrnwhich 66% of the abortion was induced. Taking the confounding effects of each variable, maritalrnstatus, parity, abortion attitude, unwanted pregnancy history, birth place and occupation were foundrnto be the major predictor variables that related with women abortion practice.rnConclusion: Women who are married, less than 30 years old, employed and who were born outsidernAddis Ababa mirrored relatively higher level of abortion practice than their counterparts. Givingrndue attention for effective family planning utilization, post abortion care, women empowerment,rnawareness on abortion legality, proper training and medical supplies are the major themes whichrnneeds to be considered for further interventions on abortion in general and unsafe abortion inrnparticular.rnKey words: Abortion , attitude, practice, unwanted pregnancy