Mazanovsky District
Mazanovsky District () is an administrative and municipal district (raion), one of the twenty in Amur Oblast, Russia. The area of the district is . Its administrative center is the rural locality (a selo) of Novokiyevsky Uval. Population:  16,028 (2002 Census);  The population of Novokiyevsky Uval accounts for 29.2% of the district's total population. Geography
River Selemdzha and its tributaries Ulma and Orlovka flow across the district. Villages and settlements
Abaykan

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Districts of Amur Oblast