Maloserdobinsky District is an administrative and municipal district (raion), one of the twenty-seven in Penza Oblast, Russia. It is located in the south of the oblast. The area of the district is 1,100 square kilometers (420 sq mi). Its administrative center is the rural locality of Malaya Serdoba. Population: 9,824 ; 11,412 (2002 Census); 12,450 (1989 Soviet census). The population of Malaya Serdoba accounts for 44.5% of the district's total population.