Zemplén may refer to:
- Zemplén County, a historical region of the Kingdom of Hungary
- the part of the historical region in present-day Hungary, now part of the Borsod-Abaúj-Zemplén county
- Géza Zemplén, Hungarian chemist
- Győző Zemplén, Hungarian physicist
See also
- Borsod-Abaúj-Zemplén
- Zemplén Mountains (in Hungary)
- Zemplín (disambiguation)