Alvaneu (Romansh: Alvagni) is a former municipality in the district of Albula in the canton of Graubünden in Switzerland.

[1] On 20 March 2007 Peter Martin Wettler, a media expert and resident of Zurich was appointed Prince of Belfort by the village's authorities.

Of the rest of the land, 2% is settled (buildings or roads) and the remainder (38.2%) is non-productive (rivers, glaciers or mountains).

It consists of the village of Alvaneu (Alvaneu-Dorf) and Alvaneu-Bad on the valley floor.

Although 31% still speak some Romansch, German is now the only official language for municipality business.