| Country: |  Indonesia |
| State: | East Java |
| Image Alt: | Mayang river (Kali Mayang), Jember regency, East Java |
| Source1: | Mount Raung |
| Source1 Location: | Ledokombo |
| Mouth: | Indian Ocean |
| Mouth Location: | Batuulo |
| River System: | DAS Mayang |
| Extra: |
Mayang River or Kali Mayang is a river located in the south of East Java and flows into the Indian Ocean at a cape in Watuulo, Jember Regency, in the southern coastal area of Java.[1] [2] The river originates in the southwest of Mount Raung. It has a length of approximately [3] and a watershed area covering .[4]