Autreppes is located some 35 km east by northeast of Saint-Quentin and 15 km west of Hirson. It can be accessed by the D31 road running from Saint-Algis in the west through the heart of the commune and the village and continuing east to Etreaupont. There are also many country roads covering the commune and accessing it from all directions. The commune consists entirely of farmland.[3]
The Oise river traverses the northern part of the commune from east to west. Only one stream flows into it from the north in the commune.[3]
The area was called Altripia in 876. Autreppes was part of the former royal estate given to the Abbey of Saint-Denis in 915. Then the village of Autreppes became a lordship until the French Revolution. In 1790 the commune was part of the Canton of Marly in the district of Vervins but in 1801 became part of the Canton of Vervins in the Arrondissement of Vervins.