| Psathi | |
| Name Local: | Ψάθη |
| Coordinates: | 36.7469°N 25.3644°W |
| Periph: | South Aegean |
| Periphunit: | Thira |
| Municipality: | Ios |
| Population As Of: | 2021 |
| Population: | 19 |
| Area: | 0.08 |
| Postal Code: | 840 01 |
| Area Code: | 22860 |
| Demonym: | Psathianós (Ψαθιανός) |
Psathi is a small settlement in Ios, Greece. It is located 8 km from Chora, the capital of Ios and 200 km from Athens.
According to Government Gazette No.161 B of 1995, the location shown on the map is considered an archaeological site. That decision was taken to preserve the remains of two ancient temples where today, on top of them are built two churches, the remains of a Roman aqueduct, and the remains of an ancient, proto-Cycladic settlement and cemetery.[1]