久尔久（罗马尼亚语：Giurgiu）是位于罗马尼亚南部，瓦拉几亚平原上的一个城市。隔多瑙河与保加利亚城市鲁塞相望。两城之间有桥梁相连。久尔久是久尔久县的首府所在地。

Giurgiu (Romanian pronunciation: [ˈd͡ʒjurd͡ʒju]) is a city in southern Romania. The seat of Giurgiu County, it lies in the historical region of Muntenia. It is situated amid mud-flats and marshes on the left bank of the Danube facing the Bulgarian city of Ruse on the opposite bank. Three small islands face the city, and a larger one shelters its port, Smarda. The rich grain-growing land to the north is traversed by a railway to Bucharest, the first line opened in Romania, which was built in 1869 and afterwards extended to Smarda. Giurgiu exports timber, grain, salt and petroleum, and imports coal, iron, and textiles.