The municipality consists of the following sub-municipalities: Arlon proper, Autelbas, Bonnert, Guirsch, Heinsch, and Toernich. Other population centers include: Autelhaut, Clairefontaine, Fouches, Frassem, Freylange, Hachy, Heckbous, Rosenberg, Sampont, Schoppach, Sesselich, Seymerich, Stehnen, Sterpenich, Stockem, Udange, Viville, Waltzing, Weyler, and Wolberg.
The municipality consists of the following sub-municipalities: Arlon proper, Autelbas, Bonnert, Guirsch, Heinsch, and Toernich. Other population cen,ters include: Autelhaut, Clairefontaine, Fouches, Frassem, Freylange, Hachy, Heckbous, Rosenberg, Sampont, Schoppach, Sesselich, Seymerich, Stehnen, Sterpenich, Stockem, Udange, Viville, Waltzing, Weyler, and Wolberg.