Background: Human milk is the ideal and uniquely superior food for infant for first year of life. Some sociodemographic factor correlate most strongly with the prevalence and duration of breast feeding. Objectives: To determine the prevalence of breast feeding and factors influencing the feeding practices in a study population in Thi-Qar governorate. Design: Cross-sectional study. Methods: in three hospitals in Thi-qar governorate, the mother of infants in the primary health care units of these hospitals, had been randomly selected and interviewed with a questionnaire which included information about the age, sex and mode of feeding for the infants, and the sociodemographic status of the mothers. The sociodemographic variables included, urban / rural residence, educational level, occupation or employment, family income, place and type of delivery and contraceptive use. Results: the prevalence of breast feeding was 90%, and bottle feeding prevalence was 10%; the mean time of weaning was 11 months. Factor that were significantly associated with duration of breast feeding were maternal age, level of education, area of residence, occupation, family income, place and type of delivery and contraceptive use. The most common reasons for refusing to breast feed were in adequately secreted milk and the mother employment outside the home. Conclusions: the prevalence of women nursing breast feeding was higher than the estimated national data the prevalence of the bottle-feeding was higher in women who needed to work out of their homes and in those with higher educational level