Arvidsjaur is a locality and the seat of Arvidsjaur Municipality in Norrbotten County, province of Lapland, Sweden with 4,635 inhabitants in 2010.

Pite Sámi or Arjeplog Sámi is a Sámi language traditionally spoken in Sweden and used to be spoken in Norway. It is a critically endangered language that has only about 25–50 native speakers left and is now only spoken on the Swedish side of the border along the Pite River in the north of Arjeplog and Arvidsjaur and in the mountainous areas of the Arjeplog municipality.