La Ferté-en-Ouche (French pronunciation: [la fɛʁte ɑ̃.n‿uʃ], literally La Ferté in Ouche) is a commune in the department of Orne, northwestern France. The municipality was established on 1 January 2016 by merger of the former communes of Anceins, Bocquencé, Couvains, La Ferté-Frênel (the seat), Gauville, Glos-la-Ferrière, Heugon, Monnai, Saint-Nicolas-des-Laitiers and Villers-en-Ouche.

The commune along with another 69 communes shares part of a 4,747 hectare, Natura 2000 conservation area, called Risle, Guiel, Charentonne.

Historical population

Year	Pop.	±% p.a.
1968	3,157	—
1975	2,887	−1.27%
1982	2,937	+0.25%
1990	2,940	+0.01%
1999	2,989	+0.18%
2007	3,292	+1.21%
2012	3,265	−0.16%
2017	3,217	−0.30%
Source: INSEE

The Commune has 6 buildings and areas listed as a Monument historique

• Chateau of La Ferté-Frênel is a 19th century Chateau, which with its garden and grounds is classed as a Monument historique.
• Château du Boële is an 18th century Chateau, based in Glos-la-Ferrière and classed as a Monument historique in 1974.
• Church of Douet-Arthus is a 12th century Church, based in Heugon and classed as a Monument historique in 1997.
• Menhir at Glos-la-Ferrière is Neolithic Menhir in Glos-la-Ferrière and was classed as a Monument historique in 1944.
• Dolmen at La Ferté-Frênel is Neolithic Dolmen in La Ferté-Frênel and was classed as a Monument historique in 1944.

• 
  Saint-Sauveur church in Monnai
• 
  Saint-Aubin church in Gauville
• 
  Couvains church
• 
  Town Hall of Gauville
• 
  Heugon
• 
  church of Saint-Pierre-et-Saint-Denis in Heugon

• Émile Bouhours (1870-1953), a French former road bicycle racer who won the 1900 Paris–Roubaix race was born here.
• Paul Bunel (1882-1918), a Norman photographer was born here.

• Communes of the Orne department