Aulnay is located some 28 km east by south-east of Arcis-sur-Aube, 16 km north-west of Brienne-le-Château, and 50 km west by south-west of Saint-Dizier. Access to the commune is by the D 35 road from Jasseines in the north which passes through the west of the commune and the village before it continues south to Chalette-sur-Voire. The D 5 road comes from Brillecourt in the west and passes through the village before continuing east to Braux. South of the village is the hamlet of Petit Aulnay. Apart from a belt of trees along the river the commune is entirely farmland.[3]
The Ravet river flows through the commune from east to west forming part of the south-facing border in both the east and west of the commune before continuing west to join the Aube at Brillecourt.[3]
The town hall contains 4 Stained glass windows (16th century) which are registered as an historical object.[8][9]
Religious heritage
The Church of Saint-Rémy was built in the 16th century but collapsed in recent years. There are only the remains of the RomansesqueNave which was rebuilt in the 18th century.[10]
The Parish Church contains many items that are registered as historical objects: