[1] It originates from its headwaters in the southern mountains of Banten, around the Sareweh in the Lebak Regency, near the settlement of the Baduy Dalam tribe.

It flows westward towards the coast in the Panimbang, region of Pandeglang and empties into Lada Bay, the Sunda Strait.

It is approximately 73 km from the center of Cilegon city to the mouth of the river.

[2][3] Ci Liman is the main stem in the Ciliman River basin system, which covers a n area of approximately 503 km2 (194 sq mi).

The warmest month is August when the average temperature is around 26 °C, and the coldest is December, at 23 °C.