Diagnostic ultrasound has become one of the most useful tools in the most useful tools in the practice of obstetrics. it has been of particular utility in the placental localization. We analyzed 34 patients of placenta previa scanned by ultrasound. The results were as follows; 1. The age of patient ranged from 22 to 39 years, showing the highest incidence in 26 to 30 years. 2. The accuracy of correct localization was 70.6% 3. Among 13 cases diagnosed by ultrasound as total placenta previa, 2 cases were partial placenta previa and 1 was low-lying placenta at the time of delivery. 4. Among 9 cases diagnosed by ultrasound as partial placenta previa, 1 case was total placenta previa and 1 case was low-lying placenta and 1 case was upper segment placenta. 5. Among 10 cases diagnosed by ultrasound as low-lying placenta, 2 cases were partial placenta previa. 6. Among 2 cases diagnosed by ultrasound as upper segment placenta, 1 case was total placenta previa and 1 case was partial placenta previa. 7. Conclusively, ultrasonography is the imaging modality of choice in the evaluation of placental localization because it provides speedy and repeatable way without any known risk to both mother and fetus itself. Careful performance and accurate interpretation should be needed for more correct placental localization.