| Kutsajoki | |
| Name Other: | Kutsajoki |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Subdivision Type3: | Region |
| Subdivision Name3: | Murmansk Oblast |
| Length: | 80km (50miles) |
| Source1 Location: | Lake Nivayarvi |
| Source1 Elevation: | 198m (650feet) |
| Mouth Location: | Tumcha |
| Mouth Coordinates: | 66.7368°N 30.4896°W |
| Basin Size: | 1350km2 |
| Tributaries Right: | Vuosnayoki |
The Kutsayoki (Russian: Кутсайоки, Finnish: Kutsajoki) is a river in the south of the Kola Peninsula in Murmansk Oblast, Russia. It is long, and has a drainage basin of . The Kutsayoki flows through the Lake Nivayarvi and flows into the Tumcha. Its biggest tributary is the Vuosnayoki.