 The commune covers an area of .Ksabi lies at an elevation of on the left (eastern) bank of the Oued Saoura in the Saoura valley; it is the lowest town on this river before it reaches the endorheic lake Sebkha el Melah.The Grand Erg Occidental, a large area of continuous sand dunes lies to the east, while the rocky ridges of the Ougarta Range rise to the west, running from northwest to southeast along the opposite side of the river from the town.