Qosira (, also Romanized as Qoà ÂërÃÂ, Qoà ÂeyrÃÂ, Kasëreh, Qasreh, and Qaà Âr-e SeyyedhÃÂ) is a village in Kavar Rural District, in the Central District of Kavar County, Fars province, Iran. At the 2006 census, its population was 525, in 120 families.