Giurgiu is a city in southern Romania. The seat of Giurgiu County, it lies in the historical region of Muntenia. It is situated amongst mud-flats and marshes on the left bank of the Danube facing the Bulgarian city of Ruse on the opposite bank. It is one of six Romanian county seats lying on the Danube river. Three small islands face the city, and a larger one shelters its port, Smarda.