Sirene (Bulgarian: сирене [ˈsirɛnɛ]; Serbian: сир/sir; Macedonian: сирење; Albanian: djathë i bardhë), also known as "white brine sirene" (Bulgarian: бяло саламурено сирене), is a type of brined cheese originating from Bulgaria.

It is made of the milk of goats, sheep, cows, buffalo or a mixture thereof.

In 2023, the name "Bulgarsko byalo salamureno sirene" was registered as a protected designation of origin in the European Union.

Pasta and cornmeal: for breakfast, macaroni or flat noodles (Bulgarian: юфка; yufka) with sirene and sugar are popular.

Kachamak (the local variant of cornmeal, polenta or the Romanian mămăligă) is always eaten with sirene.