Arrondissements of the Orne department

The 3 arrondissements of the Orne department are:[1] In 1800, the arrondissements of Alençon, Argentan, Domfront and Mortagne-au-Perche were established.

The arrondissements of Domfront and Mortagne-au-Perche were disbanded in 1926, and Then, Mortagne-au-Perche was restored in 1942.

[2] The borders of the arrondissements of Orne were modified in January 2017:[3]