After the 2006 National Census,
Kazzaz Rural District was created in the
Central District, and
Qarah Kahriz and
Kuhsar Rural Districts were separated from it in the establishment of
Qarah Kahriz District. The village of
Mohajeran was elevated to the status of a city. After the 2011 census, the village of Hafteh and Bazneh was elevated to city status as
Shahbaz. In 2024, the city of
Mohajeran and 17 villages were separated from
Zalian District in the formation of
Mohajeran District, including the new
Khosbijan and
Mohajeran Rural Districts. ==Demographics==