| Alonistaina | |
| Name Local: | Αλωνίσταινα |
| Type: | community |
| Periph: | Peloponnese |
| Periphunit: | Arcadia |
| Municipality: | Tripoli |
| Municunit: | Falanthos |
| Pop Community: | 64 |
| Population As Of: | 2021 |
| Elevation: | 1220 |
| Coordinates: | 37.625°N 35.3°W |
| Postal Code: | 221 00 |
| Area Code: | 2710 |
| Licence: | TP |
Alonistaina (Greek, Modern (1453-);: Αλωνίσταινα) is a mountain village in the municipal unit of Falanthos, Arcadia, Greece. It is situated in the forested northern Mainalo mountains, at about 1,220 m. elevation, making it one of the highest villages in the Peloponnese. It is considered a traditional settlement and is situated 6 km north of Piana, 6 km southeast of Vytina, 9 km southwest of Levidi and 18 km northwest of Tripoli. Alonistaina has a school and a church (Agia Paraskevi).
The village in the Mainalo mountains is one of the highest villages of Arcadia, Peloponnese. Kefalovriso is the largest karst spring in the area; it is dedicated to Saint Nicholas.
| Year | Population | |
|---|---|---|
| 1981 | 137 | |
| 1991 | 148 | |
| 2001 | 117 | |
| 2011 | 57 | |
| 2021 | 64 |