| Muar River | |
|---|---|
 Muar River mouth, at its namesake town | |
 | |
| Native name | Sungai Muar (Malay) |
| Location | |
| Country | Malaysia |
| State(s) | Negeri Sembilan and Johor |
| Physical characteristics | |
| Source | |
| • location | Titiwangsa Mountains near Talang, Kuala Pilah District, Negeri Sembilan |
| Mouth | |
• location | Strait of Malacca near Muar, Muar District and Tanjung Agas, Tangkak District, Johor |
• coordinates | 2°03′N 102°34′E / 2.050°N 102.567°E |
| Length | 250 km |
The Muar River (Malay: Sungai Muar) is a river which flows through the states of Negeri Sembilan and Johor in Malaysia. Its drainage basin encompasses the states aforementioned, as well as Pahang and Malacca.
Measuring around 250 km (155 mi) in length, the Muar is the third longest river in Peninsular Malaysia after the rivers of Pahang and Perak, slightly longer than the Kelantan River. It is one of the two major Negri rivers, the other being the Linggi, as well as the second most significantly important river in Johor after the Johor River.