Arsites

thumb|upright=1.2|Location of Hellespontine Phrygia, and the provincial capital of [[Dascylium, in the Achaemenid Empire, c. 500 BC.]] upright=1.2|thumb|Achaemenid Dynast of Hellespontine Phrygia attacking a Greek [[psiloi, Altıkulaç Sarcophagus, early 4th century BCE.]] Arsites (; ; ) was Persian satrap of Hellespontine Phrygia in the Achaemenid Empire in the 4th century BC. His satrapy also included the region of Paphlagonia.

In 340 BC, he sent a mercenary force under the leadership of the Athenian Apollodorus to defend Perinthos, which was besieged by Philip II of Macedon, possibly at Artaxerxes III's request. The operation was successful and prevented a further advance of Philip into Asia Minor.