Udvarhelyszék (Hungarian pronunciation: [ˈudvɒrhɛjseːk]; formerly called Telegdiszék) was one of the Székely seats 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.

The religious make-up of Udvarhelyszék in 1867 was the following:

This Hungarian history article is a stub.