Jamena (Serbian Cyrillic: Јамена) is a village in the region of Srem, southwestern Vojvodina, Serbia. It is situated in the municipality of Šid. Jamena has a population of 1,130 (2002 census), but it is declining. Most of the inhabitants of the village are ethnic Serbs. It is the only place in Serbia that borders both Croatia and Bosnia and Hercegovina (Republika Srpska).