Arna is a borough in the city of Bergen in Vestland county, Norway.

It lies along the Sørfjorden, east of the centre of the city of Bergen (the borough of Bergenhus).

The large mountains Ulriken and Rundemanen lie between the city centre and Arna.

The village areas include Haukeland, Unneland, Espeland, Rødland, Haugland, Gaupås, Ytre Arna, Indre Arna, Arnatveit, Garnes, Takvam, Songstad, and Trengereid.

This form is still used for many other local place names such as Ådnamarka, Ådnavegen, Ådnatun, and Ådnanipa (Arnanipa).

[1] The parish of Haus was established as a municipality on 1 January 1838 (see formannskapsdistrikt), including the annex Bruvik.