| Official Name: | Tunnsjø senter |
| Other Name: | Tunnsjøsenter |
| Settlement Type: | Village |
| Pushpin Map: | Trøndelag#Norway |
| Pushpin Label Position: | top |
| Subdivision Type: | Country |
| Subdivision Name: | Norway |
| Subdivision Name1: | Central Norway |
| Subdivision Name2: | Trøndelag |
| Subdivision Type3: | District |
| Subdivision Name3: | Namdalen |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Lierne Municipality |
| Utc Offset1: | +01:00 |
| Utc Offset1 Dst: | +02:00 |
| Postal Code Type: | Post Code |
| Postal Code: | 7882 Nordli |
| Coordinates: | 64.6443°N 13.7001°W |
| Elevation M: | 319 |
| Elevation Footnotes: | [1] |
Tunnsjø senter[2] is a village located in the northern part of Lierne Municipality in Trøndelag county, Norway. It is named for its location near the large lake Tunnsjøen. The village sits just west of the border with Sweden. Tunnsjø Chapel is located in the village.
Tunnsjø senter is the main village area in the far northern part of Lierne Municipality, and it is rather isolated from the rest of the municipality. To drive from this part of the municipality to the rest of Lierne, one would need to drive south about through Sweden and back into Norway.
The village sits very close to several large lakes: Limingen and Tunnsjøen to the north, Ingelsvatnet to the west, and Kvarnbergsvattnet to the east (in Sweden).