Arbignieu (French pronunciation: [aʁbiɲø]) is a former commune in the Ain department in the Auvergne-Rhône-Alpes region of eastern France.

It lies in the Appellation d'origine contrôlée (AOC) zone for wine from Bugey with the label "Roussette du Bugey-Arbignieu".

The commune can be accessed on the D69 from Belley in the north-east which continues west to Colomieu.

[3] The Furans river forms the eastern border of the commune and then flows east to join the Rhone.

The Ruisseau d'Armaille flows from west to east across the commune into the Furans.