Nizhnelomovsky District (Russian: Нижнело́мовский райо́н) is an administrative and municipal district (raion), one of the twenty-seven in Penza Oblast, Russia. It is located in the northwest of the oblast. The area of the district is 1,760 square kilometers (680 sq mi). Its administrative center is the town of Nizhny Lomov. Population: 41,974 (2010 Census); 46,540 (2002 Census); 25,510 (1989 Census). The population of Nizhny Lomov accounts for 54.0% of the district's total population.