Augy is located 10 km east by south-east of Soissons and 35 km west by north-west of Rheims. National Highway N31 (E46, D1251) from Soissons to Rheims passes through the heart of the commune just north of the village. The village can be reached on the D1310 road which branches south-west from the N31 into the village then east to join the D22 road from Braine which passes through the south-eastern part of the commune. The commune is mostly farmland with areas of forest along the borders - particularly in the west, south, and south-east.
The Vesle river forms the north-eastern border of the commune and a stream flows from the village to join the Vesle.
In 2010 the commune had 90 inhabitants. The evolution of the number of inhabitants is known through the population censuses conducted in the town since 1793. From the 21st century, a census of municipalities 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" which allow, after a transitional period running from 2004 to 2008, the annual publication of the legal population of the different French administrative districts. For municipalities with a population greater than 10,000 inhabitants, a sample survey is conducted annually, the entire territory of these municipalities 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 on 1 January 2009 and was based on the census of 2006.