Sassenage (French pronunciation: [sasnaʒ]; Arpitan: Sassenâjo) is a commune in the Isère department in southeastern France, lying in the north-west of the Grenoble urban area (and administratively within the boundaries of the Grenoble-Alpes metropolitan authority). Its historic centre is on the valley floor at the foot of a large cliff face, with housing also stretching up the lower slopes of the Vercors massif and more recent developments towards Fontaine and the Drac river.

Sassenage is twinned with: