Les Abrets is located some 30 km west of Chambery and 25 km east of Bourgoin-Jallieu. The commune can be accessed on the D1075 road from the north-west continuing through the commune and the village to La Bâtie-Divisin in the south. The D1006 highway comes from La Tour-du-Pin in the west and intersects the D1075 in the centre of the village then continues to Le Pont-de-Beauvoisin in the east. There is also the D142E road from the village going north-east, the D592 which goes north from the village continuing to Chimilin, and the D142 going north-west to Fitilieu. A railway passes through the commune from west to east with a station just outside the western edge of the commune. The urban area of Les Abrets covers a large portion of the commune with a belt of forest running north to south through the centre of the commune. With some forested areas in the east of the commune and some forest in the east, the balance of the land area is farmland.
The Bievre stream flows south down the eastern edge of the commune. Other streams flow near the village and to the south.
The term Abrets comes from Albrez Albretum or Arbreta (from the Latin Arbor: relative to a tree). This wooded area was given to the "Poor Knights of Christ" in about 1124 who then became the Knights of the Temple of Jerusalem in 1128, known under the name of the Templars.
In 2010 the commune had 3,455 inhabitants. The evolution of the number of inhabitants is known through the population censuses conducted in the commune 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.