Aksu is a neighborhood in Nazilli District, in Aydın Province, Türkiye. Aksu lies in the Aydin mountains. It has 830 inhabitants (2022). The nearest city is Nazilli, 18.5 km to the south. Among the landmarks around are Sardis (52 km), Nysa on the Maeander (26 km) and Aphrodisias (53 km).