Mikrokastro

{{Infobox Greek Dimos

|name = Mikrokastro

|name_local = Μικρόκαστρο

|type = community

|image_map =

|map_caption =

|periph = Western Macedonia

|periphunit = Kozani

|municipality = Voio (municipality)

|municunit = Siatista

|population = 368

|population_as_of = 2021

|area =

|elevation = 659

|coordinates = {{coord|40|15.95|N|21|30.2|E|format=dms|display=inline,title}}

|postal_code = 503 00

|area_code = +30-2465

|licence = ΚΖ

|image_skyline =

|caption_skyline =

}}

Mikrokastro ({{langx|el|Μικρόκαστρο}}, before 1927: Τσιρούσινον – Tsirousinon),{{Cite web|author=Institute for Neohellenic Research|title=Name Changes of Settlements in Greece: Tsirousinon – Mikrokastron|url=http://pandektis.ekt.gr/pandektis/handle/10442/171373|website=Pandektis|access-date=23 August 2024}} is a village and a community of the Voio municipality.{{Cite web|url=http://www.et.gr/idocs-nph/search/pdfViewerForm.html?args=5C7QrtC22wGYK2xFpSwMnXdtvSoClrL81-32jgAMSfbnMRVjyfnPUeJInJ48_97uHrMts-zFzeyCiBSQOpYnT00MHhcXFRTsb2fGphpq4MKX2ZkaHobySNnvZCNHXvYVvlf80XevW0Q.|title=ΦΕΚ B 1292/2010, Kallikratis reform municipalities|language=el|publisher=Government Gazette}} Before the 2011 local government reform it was part of the municipality of Siatista, of which it was a municipal district. The 2021 census recorded 368 inhabitants in the community. The community consists of the villages Mikrokastro and Mesopotamo.