| Official Name: | Mørkfoss |
| Settlement Type: | Village |
| Subdivision Name: | Norway |
| Utc Offset1: | +01:00 |
Mørkfoss is a small village in Indre Østfold municipality, Østfold, Norway. It is located in the southern end of lake Øyeren, at the continuation of Glomma river. Mørkfoss has traces of a dam construction which was built in connection to the Solbergfoss power plant.