Parc naturel régional du Haut-Jura (French pronunciation: [paʁk natyʁɛl ʁeʒjɔnal dy o ʒyʁa], Jura Mountains Regional Natural Park) is a French regional natural park located in the southwest of the Jura Mountain Range in France, on the French-Swiss border.

These towns are Divonne-les-Bains, Gex, Bellegarde-sur-Valserine, Champagnole, and the Community of Communes of Oyonnax (the latter two not having territory within the park's perimeter).

Its aim was to preserve the mountainous landscapes and biodiversity of the wilderness in part of the economic development of the environment.

It is not managed according to geographic entities but rather according to five thematic ones: There are currently 105 towns, or communes, that are members of the regional park, of which 25 are in Ain, 12 are in Doubs and 67 are in the Department of Jura.

The park is featured in numerous publications such as guidebooks, maps, photographic portfolios, and educational and scientific documents.