贝阿恩（挪威语：Beiarn）是挪威的一个自治区，位于诺尔兰郡。

Beiarn is a municipality in Nordland county, Norway. It is part of the traditional district of Salten. Beiarn is also a part of the Bodø Region, a statistical metropolitan region. The administrative centre of the municipality is the village of Moldjord. Other villages in Beiarn are Høyforsmoen, Trones, and Tverrvika.