Auboncourt-Vauzelles is located some 38 km south-west of Charleville-Mézières and 16 km north-east of Rethel. The A34 autoroute passes through the north-west of the commune but the nearest exit is Exit 14 some 6 km north of the commune. Access to the commune is by the D951 road from Novy-Chevrières in the south-west which passes through the north-west of the commune and the hamlet of Vauzelles as it goes north to join the A34 autoroute at Exit 14. The D14 road comes from Corny-Machéroménil in the north-west which passes through Vauzelles and the centre of the commune before continuing south to Faux. Access to the village is by small roads that run off the D14 - the Chemin d'Auboncourt and the Chemin de la Fontaine. The commune is entirely farmland except for the fringe of the Bois d'Auboncourt forest in the north-east.
The Ruisseau de Saulces flows through the east of the commune and the village from north to south-east and continues to join the Aisne south of Amagne.
In 2010 the commune had 102 inhabitants. The evolution of the number of inhabitants is known from the population censuses conducted in the commune since 1793. From the 21st century, a census of communes with fewer than 10,000 inhabitants is held every five years, unlike larger towns that have a sample survey every year.[Note 1]
^At the beginning of the 21st century, the methods of identification have been modified by Law No. 2002-276 of 27 February 2002, the so-called "law of local democracy" and in particular Title V "census operations" allows, after a transitional period running from 2004 to 2008, the annual publication of the legal population of the different French administrative districts. For communes with a population greater than 10,000 inhabitants, a sample survey is conducted annually, the entire territory of these communes is taken into account at the end of the period of five years. The first "legal population" after 1999 under this new law came into force in 1 January 2009 and was based on the census of 2006.