| Muna | |
| Source1: | Lake Munozero |
| Source1 Coordinates: | 67.0747°N 34.6767°W |
| Mouth: | Lake Kanozero |
| Mouth Coordinates: | 67.0647°N 34.1611°W |
| Progression: | Lake Kanozero→ |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 40km (30miles) |
| Basin Size: | 988km2 |
The Muna (ru|Муна) is a river in the southwestern part on the Kola Peninsula, Murmansk Oblast, Russia. The Muna is a tributary to the river Umba. It is long, and has a drainage basin of . Its source is Lake Munozero, about 30 km east of Lake Kanozero. From there it flows towards the west, following a winding course through a sparsely populated, hilly landscape dominated by forests and bogs. A substantial tributary, the Inga, flows into the Muna from the north. The Muna's outlet is at the eastern bank of Lake Kanozero, about 8 km southeast of where the river Umba falls into the same lake.