| Tuntang River | |
| Name Other: | Sungai Tuntang, Kali Tuntang |
| Map Size: | 285 |
| Pushpin Map: | Indonesia Java#Indonesia |
| Pushpin Map Size: | 285 |
| Pushpin Map Caption: | Location of river mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | Indonesia |
| Subdivision Type2: | Province |
| Subdivision Name2: | Central Java |
| Subdivision Type3: | Regency |
| Source1: | Lake Rawa Pening |
| Source1 Coordinates: | -7.2649°N 110.4495°W |
| Mouth: | Java Sea |
| Mouth Coordinates: | -6.8352°N 110.5241°W |
The Tuntang (Indonesian: Kali Tuntang) is a major river of northern Central Java, Indonesia, about 400 km east of the capital Jakarta.[1] It connects Lake Rawa Pening to the Java Sea, east of Semarang.[2] There is a hydroelectric power station on the river near the lake.
The river flows in the central area of Java with a predominantly tropical monsoon climate (designated as Am in the Köppen-Geiger climate classification).[3] The annual average temperature in the area is 21 °C. The warmest month is September when the average temperature is around 24 °C, and the coldest is June, at 20 °C.[4] The average annual rainfall is 3140 mm. The wettest month is January, with an average of 560 mm of rainfall, and the driest is September, with 14 mm of rainfall.[5]