Malnesfjorden or Malnesfjord (transl. Malnes Fjord) is a fjord in Bø Municipality in Nordland county, Norway. The long fjord is located between two peninsulas on the northwestern part of the island of Langøya in the Vesterålen archipelago. The inlet to the fjord lies between the village of Hovden to the northwest and the Godvika inlet to the northeast. The fjord reaches a depth of southwest of Godvika. The mountain Malnesberget lies on the western shore of the fjord.