Arpajon-sur-Cère (Occitan: Arpajon) is a French commune in the Cantal department in the Auvergne region of south-central France.
The inhabitants of the commune are known as Arpajonnais or Arpajonnaises
Arpajon-sur-Cère is located immediately to the south of Aurillac some 70 km south-east of Brive-la-Gaillarde. The town is an extension of the urban area of Aurillac. Access to the commune is by the D920 from Aurillac which continues south to Lafeuillade-en-Vézie. The D990 also goes from south of the town to Vézac in the east. The D58 comes from Giou-de-Mamou in the north-east then goes south-west from the town to the Château de Conros and joins the D617 at the south-western border of the commune. Much of the runway of Aurillac – Tronquières Airport is in the commune. A railway passes through the north of the commune but the nearest station is in Aurillac. Apart from the town there are the villages and hamlets of: