Aunay-sur-Odon is a French commune in the Calvados department in the Basse-Normandie region of north-western France.
The inhabitants of the commune are known as Aunais or Aunaises.
The commune has been awarded two flowers by the National Council of Towns and Villages in Bloom in the Competition of cities and villages in Bloom.
The commune is located at the foot of the foothills of the Armorican Massif on the Odon river a few kilometres east from its source. It is at the heart of the Pre-Bocage country of transition between the Caen plain, the Bessin, and the Bocage virois with which it is also connected.
Located at the intersection of several county roads, the agglomeration is 8 kilometres (5.0 mi) south of Villers-Bocage, 30 kilometres (19 mi) south-west of Caen, and 31 kilometres (19 mi) north-east of Vire. The D8 goes north-east to Bauquay and Caen. The D6 connects Aunay to Villers-Bocage in the north and Thury-Harcourt to the south-east. The D54 joins Cahagnes and Caumont-l'Éventé in the north-west through the village to Roucamps, Le Plessis-Grimoult, and Condé-sur-Noireau in the south. The D26 goes to Vire via Danvou-la-Ferrière and Estry in the south-west. The D213 goes to Courvaudon in the east with the D234 branching to serve Bonnemaison. The D214 goes north to Longvillers. The D291A goes west to La Bigne.