Zir Anay-e Olya (, also Romanized as Zër 'AnÃÂy-e 'OlyÃÂ; also known as Zër 'AnÃÂ'-e Baj) is a village in Rostam-e Yek Rural District, in the Central District of Rostam County, Fars province, Iran. At the 2006 census, its population was 53, in 11 families.