Korthio (Greek: Κόρθιο) is a former municipality on the island of Andros, in the Cyclades, Greece.

Since the 2011 local government reform it is part of the municipality Andros, of which it is a municipal unit.

[2] Its population was 1,706 inhabitants at the 2021 census, and its land area is 81.918 km².

[3] It shares the island of Andros with the municipal units of Andros and Ydrousa.

This South Aegean location article is a stub.