The Štiavnica is a river in southern central Slovakia. It flows through Banská Štiavnica, Krupina and Levice districts, and through the town of Banská Štiavnica. It enters the Ipeľ river west of Šahy as a right tributary. It is 55.2 km (34.3 mi) long and its basin size is 443 km (171 sq mi).

• Minor planet 22185 Štiavnica