Ci Ujung
| Ci Ujung Ujung river, Ciujung river  | |
|---|---|
The Ciberang and Ciujung rivers coming together at Rangkasbitung, 1910-1934  | |
| Location | |
| Country | Indonesia | 
| Physical characteristics | |
| Source | Mount Halimun Salak National Park | 
| • location | Bogor Regency | 
| 2nd source | |
| • location | Lebak Regency | 
| Mouth | |
 • location  | Tengkurak, Tirtayasa, Serang, Banten | 
 • coordinates  | 5°57′47″S 106°21′25″E / 5.962932°S 106.356911°E | 
| Basin size | 2,159 km2 (834 sq mi) | 
| Basin features | |
| River system | Ciujung basin | 
The Ciujung (Ujung River, as the prefix "ci" means "river") is a river in the province of West Java and Banten on the island of Java, Indonesia. Primarily in Lebak Regency, the river basin covers an area of 2,022.14 km2.