Rtishchevsky District (Russian: Рти́щевский райо́н) is an administrative and municipal district (raion), one of the thirty-eight in Saratov Oblast, Russia. It is located in the northwest of the oblast. The area of the district is 2,300 square kilometers (890 sq mi). Its administrative center is the town of Rtishchevo (which is not administratively a part of the district). Population: 17,383 (2010 Census); 19,546 (2002 Census); 21,857 (1989 Census).