CsÃÂkszék () was one of the Székely seats in the historical Székely Land.
It administered two sub-seats (Hungarian: fiúszék, Latin: sedes filialis), namely Gyergyószék and Kászonszék. It was divided on the natural borders of the region, as the main territory of CsÃÂkszék lay in the valley of the Olt River, Gyergyószék lay in the valley of the river Maros (MureÃÂ), while Kászonszék lay in the valley of the river Kászon (CaÃÂin).
The religious composition of CsÃÂkszék's population in 1867 was as follows: