Mosjøen is a town in, and the centre of the municipality of Vefsn in Norway. The town has approximately 10,000 inhabitants. The town is situated where the rivers Vefsna and Skjerva flow into the Vefsnfjord (Vefsnfjorden means "the Vefsn fjord"); the town centre lies in between these two rivers on flat land. In addition to the rivers and the fjord, the town is surrounded by big mountains, green hills and forests. Mosjøen was founded in the 1600s or 1700s, and has been growing since then. It got the title "town" in 1875. It is the oldest town in the Helgeland region and the second oldest town in Nordland county. The town is served by the Mosjøen Airport, Kjærstad that opened in 1987.
