| Aldeyjarfoss | |
| Location: | North of Iceland |
| Coords: | 65.366°N -17.348°W |
| Map: | Iceland |
| Height: | 20m (70feet) |
| Number Drops: | 1 |
The Aldeyjarfoss (pronounced as /is/) waterfall is situated in the Highlands of Iceland at the northern part of the Sprengisandur Highland Road. The river Skjálfandafljót drops here from a height of 20m. The columnar jointed basalt belongs to a 9000 years old lava field called Bárðardalshraun, hraun being the Icelandic word for lava.