Eleios-Pronnoi () is a former municipality on the island of Kefalonia, Ionian Islands, Greece. Since the 2011 local government reform it is part of the municipality Kefalonia, of which it is a municipal unit. The municipal unit has an area of 111.687 km2. Population 3,677 (2011 census). The seat of the municipality was in Pastra (pop. 133). The municipal unit contains several mountain ranges, including the eastern part of Mount Ainos. Its largest towns are Póros (pop. 930), Skála (760), and Agía Eiríni (314).