| Heddøla | |
| Name Other: | Heddalselva |
| Pushpin Map: | Telemark#Norway |
| Pushpin Map Caption: | Location of the river |
| Subdivision Type1: | Country |
| Subdivision Name1: | Norway |
| Subdivision Type2: | County |
| Subdivision Name2: | Telemark |
| Subdivision Type3: | Municipalities |
| Subdivision Name3: | Notodden, Hjartdal |
| Length: | 20km (10miles) |
| Source1 Location: | Sauland, Hjartdal |
| Source1 Coordinates: | 59.6137°N 8.9554°W |
| Mouth: | Heddalsvatnet |
| Mouth Location: | Yli, Notodden |
| Mouth Coordinates: | 59.5542°N 9.2288°W |
Heddøla is a river in the municipalities of Hjartdal and Notodden in Telemark county, Norway. It starts from the junction of the rivers Hjartdøla and Skogsåa in the village of Sauland and it flows through the Heddal valley ending at the lake Heddalsvatnet.[1]