The Târnava Mică River ("Small Târnava") is a river in Romania. Its source is in the Eastern Carpathian Mountains, in Harghita County. It flows through the Romanian counties Harghita, Mureş, and Alba, more or less parallel to and north from the Târnava Mare River. The cities of Sovata and Târnăveni lie on the Târnava Mică. It joins the Târnava Mare River in Blaj, forming the Târnava.

The following towns are situated along the river Târnava Mică, from source to mouth: Sovata, Târnăveni and Blaj.

The Târnava Mare River ("Big Târnava") is a river in Romania. Its source is in the Eastern Carpathian Mountains, near the sources of the Mureş and Olt in Harghita County. It flows through the Romanian counties of Harghita, Mureş, Sibiu, and Alba. The cities of Odorheiu Secuiesc, Sighişoara, and Mediaş lie on the Târnava Mare.