Sirene (Bulgarian: сирене; Macedonian: сирење; Serbian/Croatian: сир/sir) is a type of white brine cheese made in Bulgaria and Republic of Macedonia, similar to feta. It is a very popular cheese not only in Bulgaria and Republic of Macedonia, but also in surrounding countries. It is usually made of cow's milk, but it can be also made of sheep milk or a combination of milks.

See Siren, 6.