Terengulsky District (Russian: Тереньгу́льский райо́н) is an administrative[1] and municipal[5] district (raion), one of the twenty-one in Ulyanovsk Oblast, Russia.

It is located in the center of the oblast.

The area of the district is 1,756.3 square kilometers (678.1 sq mi)[2] Its administrative center is the urban locality (a work settlement) of Terenga.

[1] Population: 18,761 (2010 Census);[3] 20,617 (2002 Census);[7] 22,551 (1989 Soviet census).

[8] The population of Terenga accounts for 28.4% of the district's total population.