Mavranaioi () 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 and the seat. The 2021 census recorded 223 residents in the community. The community of Mavranaioi covers an area of 37.934 km<sup>2</sup>.
The community of Mavranaioi consists of three separate settlements: