Background: Miscarriage or spontaneous abortion is one of the prevalent adverse reproductive outcomes, which seriously threatens maternal health around the world. Some demographic features might associate with an elevate risk of spontaneous miscarriage which include cervical incompetence, infection, previous history of miscarriage, maternal passive smoking, age, and body weight. Objectives: The current study was carried out in order to investigate the association between socio-demographic characteristics of women undergoing miscarriage and their risk for spontaneous miscarriage in Rania city. Methodology: Quantitative design, a descriptive cross-sectional study was performed to assess the types of miscarriage and associated factors among women in Rania City. Samples of the study are Non probability purposive of (158) sample who attend Rania maternity and pediatric teaching Hospital. Besides two participants induced miscarriage were excluded. The data were collected from 1st June to 15th August 2022 through the utilization of construct questionnaire, data were collected by interview technique face to face approach of the study samples. Results: The study illustrate socio-demographic characters of miscarried women, the average age was 34.6 years and majority of them have diploma qualification (27.8%), and (61.4%) were house wife, also (48.7%) were in sufficient level of income, furthermore most of the study sample were in normal weight include (50.6%) while only (2.5%) were under weight,( 38.6%) of samples were in passive cigarette of smoking, moreover the samples’ weight and smoking cigarette associated to miscarriage (P= 0.022),(P= 0.003) respectively. Conclusion: The present study concluded that most common factor where associated with miscarriage was related to sociodemographic features. Excessive focusing on cigarette smoking exposure and maternal weight. Regarding the results of this study, mother’s demographic had relationship to miscarriage.