Ri (French pronunciation: [ʁi] ) is a commune in the Orne department in north-western France. This commune has the shortest name of any department in the Orne.

Saint John Eudes, the forerunner of the devotion to Sacred Heart, was born here.

The commune of Ri is made up of the following collection of villages and hamlets, Ri and Houay

The source of the river Houay, a tributary of the Orne originates from the settlement of the same name.

Ri 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.

In advance of the construction of the A88 autoroute a Neolithic Flint Mine was discovered in Ri.

• 
  The oratory at Saint-Jean-Eudes, Ri

• John Eudes, born in Ri, was a French Roman Catholic priest and the founder of both the Order of Our Lady of Charity in 1641 and Congregation of Jesus and Mary, also known as The Eudists, in 1643.
• François Eudes de Mézeray born in Ri, was a French Historian

• Communes of the Orne department

•  This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Mézeray, François Eudes de". Encyclopædia Britannica. Vol. 18 (11th ed.). Cambridge University Press. p. 350.