Miercurea Ciuc (; , , ; ) is the county seat of Harghita County, Romania. It lies in the Székely Land, an ethno-cultural region in eastern Transylvania, and is situated in the Olt River valley. The city administers three villages:

• Ciba / Csiba
• Harghita-Bai / Hargita-fürdo
• Jigodin-Bai / Zsögöd-fürdo, including Jigodin / Csíkzsögöd

Miercurea Ciuc (; , , ; ) is the county seat of Harghita County, Romania. It lies in the Székely Land, an ethno-cultural region in eastern Transylvania, and is situated in the Olt River valley. The city administers three villages:

• Ciba / Csiba
• Harghita-Bai / Hargita-fürdo
• Jigodin-Bai / Zsögöd-fürdo, including Jigodin / Csíkzsögöd