| Rengen | |
| Pushpin Map: | Trøndelag#Norway#Sweden |
| Pushpin Label Position: | left |
| Pushpin Map Alt: | Location 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 |
Rengen 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 the municipality of Lierne in Trøndelag county, and the Swedish part is located in the municipality of Krokom in Jämtland County. Water flows into Rengen from the lake Ulen to the north.[1]