| Rengen | |
| Caption Map: | Interactive map of the lake |
| Coordinates: | 64.0985°N 13.9829°W |
| Location: | Lierne (Trøndelag) and Krokom (Jämtland) |
| Basin Countries: | Norway, Sweden |
| Area: | 21.5km2 |
| Reference: | NVE[1] |
Rengen[2] is a lake on the border between Sweden and Norway. The 21.49km2 lake covers in Norway and in Sweden. The Norwegian part is located in Lierne Municipality in Trøndelag county, and the Swedish part is located in Krokom Municipality in Jämtland County. Water flows into Rengen from the lake Ulen to the north.[3]