| Oreino | |
| Name Local: | Ορεινό |
| Type: | municipal unit |
| Periph: | East Macedonia and Thrace |
| Periphunit: | Kavala |
| Pop Municunit: | 960 |
| Population As Of: | 2021 |
| Area Municunit: | 318.6 |
| Coordinates: | 41.15°N 57°W |
| Licence: | ΚΒ |
Oreino (el|Ορεινό) is a former municipality in the Kavala regional unit, East Macedonia and Thrace, Greece. Since the 2011 local government reform it is part of the municipality Nestos, of which it is a municipal unit.[1] The municipal unit has an area of 318.555 km2.[2] Population 960 (2021). The seat of the municipality was in Lekani.