Lošinj (; ; ; )) is a Croatian island in the northern Adriatic Sea, in the Kvarner Gulf. It is almost due south of the city of Rijeka and part of the Primorje-Gorski Kotar County.

Lošinj (; ; ; )) is a Croatian island in the northern Adriatic Sea, in the Kvarner Gulf. It is almost due south of the city of Rijeka and part of the Primorje-Gorski Kotar County.