Fontaine (French pronunciation: [fɔ̃tɛn] ⓘ; Arpitan: Fontana) is a commune in the Isère department in southeastern France.

Part of the Grenoble urban unit (agglomeration),[3] it is the third-largest suburb of the city of Grenoble, and is adjacent to it on the west.

Fontaine is twinned with:

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