Cristuru Secuiesc) is a town in Harghita County, Romania. The town was part of the former county of Udvarhely during the Kingdom of Hungary.
Administratively 2 villages belong to the town: Beteşti (joined the town after breaking away from the commune of Mugeniin 2004.) and Filiaş
The Unitarian Gimnazium (secondary school) was established in the 18th century. The Catholic church has medieval murals.