Sainte-Eulalie-en-Royans (French pronunciation: [sɛ̃t‿ølali ɑ̃ ʁwajɑ̃]; Vivaro-Alpine: Santa Eulàlia de Roians) is a commune in the Drôme department in the region Auvergne-Rhône-Alpes, southeastern France.

The bordering communes are Pont-en-Royans, Saint-Laurent-en-Royans and Échevis.

The "Réculée des Grands Goulets" is a remarkable geological site of 1,645.95 hectares, crossed by the Vernaison, which is located in the towns of Châtelus (in the place called Grands Goulets), La Chapelle-en-Vercors, Échevis, Sainte-Eulalie-en-Royans, Saint-Julien-en-Vercors, Saint-Laurent-en-Royans, Saint-Martin-en-Vercors and Pont-en-Royans.

In 2014, it was classified in the "Inventory of Geological Heritage"».

This Drôme geographical article is a stub.