Miercurea Nirajului is a town located in Mureș County, Romania. It is situated within the Székely Land, which is an ethno-cultural region found in eastern Transylvania.
The town serves as the administrative center for seven surrounding villages: Beu (Székelybő), Dumitreștii (Demeterfalva), Lăureni (Kisszentlőrinc), Moșuni (Székelymoson), Șardu Nirajului (Székelysárd), Tâmpa (Székelytompa), and Veța (Vece).