Background: Unintended pregnancy is a key public health indicator. Estimating the prevalence of unintended pregnancy and identifying risk factors are crucial to the design of effective preventive interventions.Aim: The study was aimed to explore the prevalence of unintended pregnancy and associated factors in port-said city.Subject and Methods: The study was carried out at ante-natal clinics in all maternal and child health settings representing the six districts of Port-said using a cross-sectional descriptive design. The study subjects consisted of 600 women who attended the previous mentioned settings. A structured interviewed schedule sheet designed and utilized to collect the necessary data about unintended pregnancy, contraceptives and factors influencing them.Results: Results of study showed that about one third of the studied women were exposed to unintended pregnancy. Regarding reasons given by women for UP, almost half of them didn't use contraceptives and partially similar proportion were exposed to failure of the method used for contraception, and the rest reported that they discontinued using contraceptive method before the current pregnancy. A statistically significant relation was visible in the present study between deprived socio-economic backgrounds and the rate of unintended pregnancy. Conclusion: Near to one third of women were exposed to unintended pregnancy. Age, age at first marriage, educational status of women, economy of the household, children ever born, contraceptive use, and spousal communication were significantly associated with unintended pregnancy in Port said.Recommendations: Mass media should be used more effectively as a powerful way to disseminate consistent knowledge to large number of the population about unintended pregnancy and contraceptives. Raising women awareness about contraceptive is imperative. Particular attention should be given about ECPs in case of unprotected intercourse to prevent unwanted pregnancy.