Auge is located some 45 km west by north-west of Charleville-Mézières and 22 km east by south-east of Hirson. The western border of the commune is the border between the departments of Ardennes and Aisne. Access to the commune is by the European route E44 (D8043) from Hirson which passes through the north of the commune and continues east to Maubert-Fontaine. Access to the village is by either the Grande Rue or by the Ruelle de l'Eglise which both branch south from the E44. Apart from a band of forest on the south-eastern border (The Bois de Moirvaux) and some patches of forest in the south-west the commune is entirely farmland.
In 2010 the commune had 52 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.