Oreino

{{for|the village in Crete|Oreino, Lasithi}}

{{Infobox Greek Dimos

|name = Oreino

|name_local = Ορεινό

|type = municipal unit

|image_map = DE Orinou.svg

|map_caption = Location within the regional unit

|periph = East Macedonia and Thrace

|periphunit = Kavala

|municipality = Nestos

|pop_municunit = 960

|population_as_of = 2021

|area_municunit = 318.6

|elevation =

|coordinates = {{coord|41|09|N|24|33|E|format=dms|display=inline,title}}

|postal_code =

|area_code =

|licence = ΚΒ

|website =

|image_skyline =

|caption_skyline =

}}

Oreino ({{langx|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.{{Cite web|url=http://www.et.gr/idocs-nph/search/pdfViewerForm.html?args=5C7QrtC22wGYK2xFpSwMnXdtvSoClrL8-SrPzKAEPjjtIl9LGdkF53UIxsx942CdyqxSQYNuqAGCF0IfB9HI6hq6ZkZV96FIukI0UzcPsWCK0LpLhpa7rhiWB4R5ntTnoWw7U8E1Amg.|title=ΦΕΚ A 87/2010, Kallikratis reform law text|language=el|publisher=Government Gazette}} The municipal unit has an area of 318.555 km².{{cite web|url=http://dlib.statistics.gr/Book/GRESYE_02_0101_00098%20.pdf|publisher=National Statistical Service of Greece|title=Population & housing census 2001 (incl. area and average elevation)|language=el}} Population 960 (2021). The seat of the municipality was in Lekani.