Athis-Mons (French pronunciation: [atisˈmɔ̃s]) is a commune in the southern suburbs of Paris, France. It is located 16.5 km (10.3 mi) from the center of Paris.
Inhabitants are called Athégiens.
A small part of Orly International Airport lies on the territory of the commune of Athis-Mons.
Athis-Mons was formed in 1817 by joining two villages, Athis (along the Seine) and Mons (on the adjacent plateau). Nowadays the lower area of the commune is commonly called Athis-Val.
Athis-Mons is located at the confluence of Orge and Seine rivers, and at the southern edge of the international airport of Orly.
The canton of Athis-Mons has 2 communes (the other is Paray-Vieille-Poste) and 36,615 inhabitants. Athis-Mons is a twin town of Ballina in Ireland.
Athis-Mons is served by Athis-Mons station on Paris RER line C.