| Giannaioi | |
| Name Local: | Γιανναίοι |
| Type: | community |
| Periph: | Peloponnese |
| Periphunit: | Arcadia |
| Municipality: | Megalopoli |
| Municunit: | Falaisia |
| Pop Community: | 49 |
| Population As Of: | 2021 |
| Coordinates: | 37.2333°N 33°W |
Giannaioi (el|Γιανναίοι) is a community of the municipal unit of Falaisia in Arcadia, Peloponnese, Greece. It consists of the two mountain villages Ano Giannaioi and Kato Giannaioi. Ano Giannaioi is 1 km southeast of Kato Giannaioi. Both villages are situated on a mountain slope, in the northern foothills of the Taygetus mountains, between 600 and 700 m elevation. Kato Giannaioi is 1 km south of Kamara, 5 km north of Dyrrachio, 11 km southeast of Leontari and 19 km south of Megalopoli.
| Year | Kato Giannaioi | Ano Giannaioi | Community | |
|---|---|---|---|---|
| 1991 | 73 | - | - | |
| 2001 | 66 | 23 | 89 | |
| 2011 | 47 | 35 | 82 | |
| 2021 | 36 | 13 | 49 |