Arganchy (French pronunciation: [aʁɡɑ̃ʃi] ^ⓘ) is a commune in the Calvados department in the Normandy region of northwestern France.

Arganchy is located in the area of Bessin in the valley of the Gourguichon Stream some 6.5 km south-west of Bayeux and 7 km north-east of Castillon. Access to the commune is by the D192 road from Subles in the west passing through the commune north of the village and continuing east to join National Highway N13 east of Monceaux-en-Bessin. The village is reached by the country road L'Eglise running off the D192. The D572 highway runs through the north-western corner of the commune with an exit onto the D192 at Subles. Apart from the village there are also the hamlets of La Mauvielle, Saint-Amator, La Petite Flague, and Les Feffes in the commune. The commune is entirely farmland.

The Cayennes Stream flows from the south to join the Gourgichon Stream east of the village which flows west to join the Drôme at Aprigny (Agy).

The name Arganchy appears as Archenceium in 1198.

The origin of the name is attributed to the anthroponym Argentius: Latin according to René Lepelley or Gaulish according to Albert Dauzat and Charles Rostaing.

In 1829 Arganchy (with 285 inhabitants in 1821) absorbed Saint-Amator (with 52 inhabitants) east of its territory.

List of Successive Mayors

The council is composed of eleven members including the mayor and two deputy mayors.