Sainte-Marie-la-Robert (French pronunciation: [sɛ̃t maʁi la ʁɔbɛʁ] ) is a commune in the Orne department in north-western France. As of 2021, the commune had a population of 88 inhabitants.

The commune is made up of the following collection of villages and hamlets, La Sorière, La Chabossière and Sainte-Marie-la-Robert.

The commune is within the Normandie-Maine Regional Natural Park.

Sainte-Marie-la-Robert along with another 69 communes is part of a 20,593 hectare, Natura 2000 conservation area, called the Haute vallée de l'Orne et affluents.

It is 550 hectares (2.1 sq mi) in size. The highest point in the commune is 207 metres (679 ft).

The river Udon along with two streams, the Coupigny and the Moulin de Besnard are the three watercourses that traverse the commune.

Sainte-Marie-la-Robert is governed by a conseil municipal composed of seven members, consisting of both a mayor and deputy mayor.

This list is incomplete; you can help by adding missing items. (June 2022)

List of Mayors of Sainte-Marie-la-Robert

In office		Name	Party	Quality
?	March 2008	Serge Guillaume	—	Farmer
March 2008	Incumbent	Jean-Paul Huette	Independent	Farmer

Manor a sixteenth century Manor House, located in Sainte-Marie-la-Robert was classified as a Monument historique in 1926.

• Communes of the Orne department
• Parc naturel régional Normandie-Maine