| Aldeyjarfoss | |
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 Aerial panorama of Aldeyjarfoss | |
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| Location | North of Iceland |
| Coordinates | 65°21′57.60″N 17°20′52.80″W / 65.3660000°N 17.3480000°W |
| Total height | 20 m (66 ft) |
| Number of drops | 1 |
The Aldeyjarfoss (Icelandic pronunciation: [ˈaltˌeiːjarˌfɔsː] ⓘ) 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.
