| Settlement Type: | Village |
| Pushpin Map: | Norway Telemark#Norway |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location of the village |
| Subdivision Type: | Country |
| Subdivision Name: | Norway |
| Subdivision Name1: | Eastern Norway |
| Subdivision Name2: | Telemark |
| Subdivision Type3: | District |
| Subdivision Name3: | Grenland |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Porsgrunn Municipality |
| Utc Offset1: | +01:00 |
| Utc Offset1 Dst: | +02:00 |
| Area Total Km2: | 0.43 |
| Population As Of: | 2022 |
| Population Total: | 465 |
| Population Density Km2: | 1074 |
| Postal Code Type: | Post Code |
| Postal Code: | 3947 Langangen |
| Coordinates: | 59.0877°N 9.8046°W |
| Elevation M: | 26 |
| Elevation Footnotes: | [1] |
Langangen is a village in Porsgrunn Municipality in Telemark county, Norway. The village is located in the far eastern part of the municipality, just before the border with neighboring Larvik Municipality, about to the southeast of the town of Porsgrunn. Langangen has its own elementary school and Langangen Church.[2]
The 0.43km2 village has a population (2022) of 465 and a population density of .[3]
The European route E18 highway historically passed through the middle of the village, but in 1979 the road was re-routed over a new Langangen bridge further to the north.