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Karaj County (Persian: شهرستان کرج‎) is a county in Alborz Province in Iran. The capital of the county is Karaj. At the 2006 census, the county's population was 1,709,481, in 472,365 families. The county is subdivided into two districts: the Central District and Asara District. The county has six cities: Karaj, Asara, Garmdarreh, Kamal Shahr, Mahdasht, and Mohammadshahr.

Bagh-e Pir (Persian: باغ پير‎, also Romanized as Bāgh-e Pīr) is a village in Garmdarreh Rural District, in the Central District of Karaj County, Alborz Province, Iran. At the 2006 census, its population was 208, in 57 families.

Sarv Dar (Persian: سرودار‎, also Romanized as Sarv Dār and Sarūdār; also known as Sarvdār-e Pā’īn and Sardār-e Pā’īn) is a village in Adaran Rural District, Asara District, Karaj County, Alborz Province, Iran. At the 2006 census, its population was 347, in 110 families.

Purkan (Persian: پوركان‎, also Romanized as Pūrkān) is a village in Adaran Rural District, Asara District, Karaj County, Alborz Province, Iran. At the 2006 census, its population was 360, in 114 families.

Shahid Soltani School is a NODET (National Organization for Development of Exceptional Talents, also known as SAMPAD) School for talented students in Karaj, Alborz Province, Iran . Shahid Soltani is among nationwide schools developed specifically to provide a superior education for exceptionally talented students in Iran, and are managed by the National Organization for Development of Exceptional Talents.