Pite Sámi or Arjeplog Sámi (Pite Sami: Bidumsámegiella, Swedish: Pitesamiska, Norwegian: Pitesamisk) is a Sámi language traditionally spoken in Sweden and Norway. It is a critically endangered language that has only about 25–50 native speakers left and is now almost 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.

Pite Sámi is a part of the Western Sámi group, together with Southern Sámi and Ume Sámi to the south, Lule Sámi and Northern Sámi to the north. Of these, Pite Sámi shows closest affinity to Lule Sámi, but a number of features also show similarity to Ume and Southern Sámi.

The Pite Sámi consonant inventory is very similar to that found in neighbouring Lule Sámi, but lacks contrastive voicing of stops and affricates entirely.

The Pite Sámi vowel inventory has a relative lack of phonemic diphthongs, compared to other Sámi languages and particularly neighbouring Lule Sámi. Instead, there are more vowel height distinctions.

Sammallahti divides Pite Sámi dialects as follows:

Features of the northern dialects are:

Features of the southern dialects are:

For a long time, Pite Sámi was one of the four Sámi languages without an official written language. A working orthography was developed in 2008–2011 by the Sámi Association of Arjeplog; this version was described by Joshua Wilbur and implemented in the dictionary Pitesamisk ordbok samt stavningsregler, published in 2016. On August 20, 2019, an official orthography was approved for the language. The orthography closely resembles the orthography of neighbouring Lule Sámi.