Jørnfjorden[1] is a fjord in Bø Municipality in Nordland county, Norway.

The 7-kilometre (4.3 mi) long fjord is an arm of Eidsfjorden, cutting into the large island of Langøya in the Vesterålen archipelago.

The inlet to the ford lies between the villages of Straumsnes to the west and Guvåg to the east.

The fjord reaches a depth of 67 metres (220 ft) just northeast of the small village of Auvåg.

The village of Klakksjorda lies on the other side, along an arm of the fjord named Vestfjord.