Saltstraumen is a narrow strait located in Bodø Municipality within Nordland county, Norway. Situated approximately 10 kilometers southeast of the town of Bodø, it connects the outer Saltfjorden to the larger Skjerstad Fjord. The waterway lies between the islands of Straumøya and Knaplundsøya, forming a critical geographical link in the region's coastal network.

The strait has existed for roughly two to three thousand years, having formed after the area was transformed by post-glacial rebound. Archaeological evidence includes the remains of a 10,000-year-old hunter settlement, representing the oldest known traces of human habitation in Bodø and among the earliest discoveries in Norway. These early inhabitants were drawn to the area by the abundant fish populations sustained by the powerful currents.

The channel is defined by its extreme tidal dynamics, featuring one of the strongest currents globally. Up to 400 million cubic meters of seawater pass through the 3-kilometer-long and 150-meter-wide strait every six hours. This flow generates vortices known as whirlpools or maelstroms, which can reach diameters of 10 meters and depths of 5 meters when the current peaks.

The location is a significant destination for anglers due to its rich marine life, including saithe, cod, wolffish, rose fish, and halibut. Coalfish is particularly notable in the area, with the largest documented specimen weighing 22.7 kilograms caught there. The strong stream also supports unique ecological niches, such as providing habitat for Eiders, which are the only birds capable of diving for mussels in such conditions.

Access to the strait is facilitated by the Saltstraumen Bridge on Norwegian County Road 17. The current's behavior varies based on tidal phases and environmental factors like wind or freshwater input from surrounding mountains. While specific population figures are not provided, the area remains a focal point for tourism and fishing activities, with visitor information available through local guides.