Eleios-Pronnoi () is a former municipality on the island of Kefalonia, Ionian Islands, Greece. Since the 2019 local government reform it is part of the municipality Argostoli, of which it is a municipal unit. The municipal unit has an area of 111.687 km<sup>2</sup>. The seat of the municipality was in Pastra. The municipal unit contains several mountain ranges, including the eastern part of Mount Ainos.
The municipal unit Eleios-Pronnoi is subdivided into the following communities (constituent villages in brackets):