| Ilfjellet | |
| Map: | Trøndelag#Norway |
| Map Alt: | Map of the location |
| Label Position: | bottom |
| Coordinates: | 62.9456°N 9.9414°W |
| Coordinates Ref: | [1] |
| Location: | Trøndelag, Norway |
| Elevation M: | 1218 |
| Prominence M: | 790 |
Ilfjellet is a mountain in the municipality of Rennebu in Trøndelag county, Norway. It is located in the northeastern part of the municipality, about north of the municipal center of Berkåk and southeast of Å in neighboring Meldal municipality. The mountain is tall.[2]
The mountain is named after the river Ila. The last element is the finite form of fjell which means "fell" or "mountain". The river name is derived from Old Norse íla which means "spring".