Plastiras (Greek: Πλαστήρας, Δήμος Πλαστήρα) is a former municipality in the Karditsa regional unit, Thessaly, Greece.

[3] It was named after the Greek general and Prime Minister Nikolaos Plastiras.

Lake Plastiras covers a part of the municipal unit.

Its residents are engaged chiefly in agriculture.

The municipal unit Plastiras is subdivided into the following communities (constituent villages in brackets):