Birjand County (Persian: شهرستان بیرجند) is in South Khorasan province, Iran.

[3] In 2007, the village of Mohammadiyeh was elevated to the status of a city as Mohammadshahr.

[2] Birjand County's population history and administrative structure over three consecutive censuses are shown in the following table.

Due to the political and strategic location of Birjand, the country's third airport was built in this city in 1933, after Qaleh Morghi and Bushehr.

Media related to Birjand County at Wikimedia Commons