Agia (Greek: Αγιά, romanized: Agiá) is a village and a municipality in the Larissa regional unit, Thessaly, Greece.

Agia is located east of Larissa and south of Melivoia.

The Mavrovouni mountains dominate the south and the Aegean Sea lies to the east.

[3] The municipal unit of Agia is divided into the following communities:[2] The province of Agia (Greek: Επαρχία Αγιάς) was one of the provinces of the Larissa Prefecture.

Agia became part of Greece, along with most of Thessaly, in 1881.