Dormans is located in the valley of the Marne, at the border between the departments of the Marne and the Aisne, some 40 km from Reims and 25 km from Chateau-Thierry. TheRN 3 goes through Dormans and leads to theautoroute A4. Dormans has a train station on theParis–Strasbourg railway that sees multipleSNCF trains daily.
Dormans is at the heart of the Champagne vineyards.