Arieșeni (German: Leppusch; Hungarian: Lepus) is a commune located in Alba County, Transylvania, Romania.

The commune is composed of eighteen villages: Arieșeni, Avrămești, Bubești, Casa de Piatră, Cobleș, Dealu Bajului, Fața Cristesei, Fața Lăpușului, Galbena, Hodobana, Izlaz, Păntești, Pătrăhăițești, Poienița, Ravicești, Ștei-Arieșeni, Sturu, and Vanvucești.

The river Arieșul Mare, which has its source in the nearby Mount Vârtopul, flows through Arieșeni.

The first ski lift in Romania was installed in Arieșeni and with the opening of the new slope, the resort has also got a brand new funicular.

There are several other notable natural tourist sites in the area, including the Vârciorog Waterfall, the Scărișoara Cave, Groapa Ruginoasă, Piatra Grăitoare, Pătrăhăițești village, and the Cucurbăta Mare, also known as the Bihor Peak.