Melamchi River (Nepali: मेलम्चि खोला) is a tributary of the Indrawati River. It originates from the Jugal Himal at an elevation of about 5,875 m (19,275 ft) above sea level. It joins the Indrawati River at Melamchi Bazaar.

The Melamchi River is 41 km (25 mi) long and has a catchment area of 330 km (130 sq mi) up to the confluence. The river flows southwards and widens downstream.

The mean annual flow is 9.7 m/s. The maximum flow is 289 m/s.

• Melamchi Water Supply Project in the river diverts water from the river to Kathmandu for drinking.

• In June 2021, a flood in the river damaged the Melamchi Bazaar, killing several locals and some foreigners.

• List of rivers of Nepal

27°50′00″N 85°34′38″E / 27.8334°N 85.5771°E / 27.8334; 85.5771