Kassopaia () is a former municipality on the island of Corfu, Ionian Islands, Greece. Since the 2019 local government reform it is part of the municipality North Corfu, of which it is a municipal unit. It is located in the northeasternmost tip of the island of Corfu. It has a land area of 33.749 km<sup>2</sup> and a population of 2,281 (2021 census). The seat of the municipality was the village Gimari.
The municipal unit Kassopaia is subdivided into the following communities (constituent villages in brackets):