Krassó-Szörény (Hungarian: Krassó-Szörény, Romanian: Caraș-Severin, Serbian: Karaš-Severin or Караш-Северин) was an administrative county (comitatus) of the historic Kingdom of Hungary.

It shared borders with the Kingdom of Serbia and the Hungarian counties of Temes, Arad and Hunyad.

The rivers Bega, Timiș, Bârzava, Caraș, Nera and Cerna flowed through the county.

Previously, Krassó County had been re-established in 1779, with significantly different borders than in medieval times, while Szörény County had only been established in 1873 (it was the shortest-lived county in the modern Kingdom of Hungary), mostly on the territory of the former Vlach Regiment of the Banat Military Frontier.

In 1920, by the Treaty of Trianon, most of the county was assigned to Romania, with one small part (villages of Banatska Subotica and Dobričevo) which was assigned to the Kingdom of Serbs, Croats and Slovenes.