Hérouville-Saint-Clair () is a commune in the Calvados department in the Normandy region in northwestern France.
It is a suburb of the city of Caen, and lies adjacent to it in a northeasterly direction, along the west side of the Canal de Caen à la Mer. Its inhabitants are called Hérouvillais.
Just across the canal from Hérouville is a Renault Trucks manufacturing plant, which is situated between the canal and the Orne River. Just east of the river is the town of Colombelles.
Hérouville was the commune name until 1957.