Sai is a commune in the Orne department in northwestern France.

The commune of is made up of the following villages and hamlets (Bordeaux and Sai).

[4] Sai along with another 70 communes is part of a 20,593 hectare, Natura 2000 conservation area, called the Haute vallée de l'Orne et affluents.

[5] Sai has 2 bodies of water running through it, The Orne and The Ure.

[6] The name of the village has been found under the forms: Saium in 1086, See et Zee in 1207, Saieum in 1223, Sav in 1418.