The Zemplín Mountains is a small mountain range in southeastern Slovakia, geologically part of the Mátra-Slanec Area of the Inner Western Carpathians.
The range of about 101 square kilometers is near the border of Hungary and the region of its Tokaj-Hegyalja vineyards. The highest mountain of the range is Rozhladňa (469 meters). An important river is Roňava which also forms the border with Hungary; another river with its headwaters here is the Bodrog.