| Knatthøin | |
| Map: | Innlandet#Norway |
| Map Alt: | Map of the location |
| Label Position: | bottom |
| Coordinates: | 62.0293°N 8.85°W[1] |
| Location: | Innlandet, Norway |
| Elevation M: | 1703 |
| Prominence M: | 43 |
| Isolation Km: | 2.2 |
| Elevation Ref: | [2] |
Knatthøin is a mountain in Lesja Municipality in Innlandet county, Norway. The 1883m (6,178feet) tall mountain lies inside Reinheimen National Park, about south of the village of Lesja. The mountain is surrounded by several other mountains including Søre Kjølhaugen which is about to the northwest, Kjølen which is about to the northwest, and Skardtind which is about to the west.