Ziakas (Greek: Ζιάκας, before 1927: Τίστα – Tista,[2] between 1940 and 2017: Ζάκας – Zakas)[3] is a village and a community of the Grevena municipality.

Before the 2011 local government reform it was a part of the municipality of Theodoros Ziakas, of which it was a municipal district.

[4] The 2021 census recorded 136 residents in the community.

[1] The community of Ziakas covers an area of 29.711 km2.

[5] The community of Ziakas consists of two separate settlements:[1]