Udvarhelyszék (Hungarian pronunciation:[ˈudvɒrhɛjseːk]) was one of the Székelyseats in the historical Székely Land.
Situated on the western part of the Székely Land, it was the main seat (Hungarian:anyaszék, Latin:sedes principalis, sedes capitalis) for a significant period, being the home of the Count of the Székelys and the Székely National Assembly; it also fulfilled the main administrative and judiciary functions.
It administered two sub-seats (Hungarian: fiúszék, Latin: sedes filialis): Bardócszék and Keresztúrszék.
Population
The religious make-up of Udvarhelyszék in 1867 was the following: