Le Châtellier (French pronunciation: [lə ʃatəlje] ⓘ) is a commune in the Orne department in north-western France.

The commune is made up of the following collection of villages and hamlets, Le Hamel, Les Fermés and Le Châtellier.

[3] It is 820 hectares (3.2 sq mi) in size.

The highest point in the commune is 192 metres (630 ft).

The Halouze and the Varenne are the two rivers, running through this commune.