| Official Name: | Árnafjørður |
| Settlement Type: | Village |
| Pushpin Map: | Faroe Islands |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location of the village in the Faroe Islands |
| Subdivision Type: | State |
| Subdivision Type1: | Constituent country |
| Subdivision Name1: |  Faroe Islands |
| Subdivision Type2: | Island |
| Subdivision Name2: | Borðoy |
| Subdivision Type3: | Municipality |
| Unit Pref: | Imperial |
| Population As Of: | 1 March 2024 |
| Population Total: | 65 |
| Timezone1: | GMT |
| Utc Offset1: | +0 |
| Timezone1 Dst: | EST |
| Utc Offset1 Dst: | +1 |
| Coordinates: | 62.2558°N -6.5342°W |
| Blank Name: | Climate |
| Blank Info: | Cfc |
Árnafjørður (Danish: Arnefjord) is a town of the municipality of Klaksvík, on the island of Borðoy, in the Faroe Islands.
Árnafjørður is located at the bottom of a deep inlet, named Árnfjarðarvík, "corner fjord's bay", on the east side of Borðoy. In 1875, an abandoned Norwegian vessel loaded with large amounts of timber drifted ashore at Árnafjørður. The timber was sold at an auction and, because of the sudden surplus, the price for timber decreased significantly. Timber has always been expensive in the Faroes as, other than driftwood, it usually has to be imported.[1]