Aksu is a village in Çelikhan District, in Adıyaman Province, Türkiye. Aksu lies at 1,063 m above sea level, in the Malatya Dağları mountains. It has 335 inhabitants. The nearest city is Adıyaman, 25 km to the south. Among the landmarks around are Arslantepe (44 km), Karakuş Tumulus (26 km) and Arsameia (29 km).