Hornád (Slovak) or Hernád (Hungarian) is a river in eastern Slovakia and north-eastern Hungary.
It is a tributary to the river Sajó, which is itself a tributary to the river Tisza. The source of the Hornád is in the Low Tatra mountains under the Kráľova hoľa hill, southwest of Poprad. It flows through the Slovak regions Spiš and Abov, and the Hungarian county Borsod-Abaúj-Zemplén. It is 286 km long, 193 km located on territory of Slovakia. Cities along its course are Spišská Nová Ves and Košice, both in Slovakia and its tributaries include Hnilec River and Torysa. It flows into the river Sajó (Slovak Slaná) southeast of Miskolc.