Orient Forest Regional Natural Park (French: Parc naturel régional de la Forêt d'Orient) is a protected area of woodlands and lakes in the Champagne-Ardenne region of France. It covers a total area of 70,000 hectares (170,000 acres) The parkland encompasses the large Forêt d'Orient National Nature Reserve and three man-made lakes: Lac d'Orient, Lac du Temple and Lac Amance. The area was officially designated as a regional natural park in 1970.

The park includes the following member communes:

• Amance • Argançon • Assencières
• Blaincourt-sur-Aube • Bossancourt • Bouranton • Brévonnes • Briel-sur-Barse • Brienne-la-Vieille • Brienne-le-Château
• Champ-sur-Barse • Chauffour-lès-Bailly • Courteranges
• Dienville • Dolancourt • Dosches
• Épagne
• Géraudot
• Jessains • Juvanzé
• Lassicourt • Laubressel • Lesmont • La Loge-aux-Chèvres • Lusigny-sur-Barse • Luyères
• Magny-Fouchard • Maison-des-Champs • Maizières-lès-Brienne • Mathaux • Mesnil-Saint-Père • Mesnil-Sellières • Molins-sur-Aube • Montiéramey • Montreuil-sur-Barse
• Onjon
• Pel-et-Der • Piney • Précy-Notre-Dame • Précy-Saint-Martin • Puits-et-Nuisement
• Radonvilliers • Rosnay-l'Hôpital • La Rothière • Rouilly-Sacey
• Saint-Christophe-Dodinicourt • Saint-Léger-sous-Brienne
• Thennelières • Trannes
• Unienville
• Val-d'Auzon • Vauchonvilliers • Vendeuvre-sur-Barse • Villemoyenne

The three man-made lakes offer sport and leisure activities for visitors and a home to animals. The largest, Lac d'Orient, covers 2,500 hectares (6,200 acres) beside two marinas and three sand beaches.

• 
  Lac Amance
• 
  Lac du Temple
• 
  Lac d'Orient

• List of regional natural parks of France
• Lake of Orient

• Official park website (in French)
• Official park website (in English)