Omsky District (Russian: О́мский райо́н) is an administrative[1] and municipal[5] district (raion), one of the thirty-two in Omsk Oblast, Russia.

It is located in the southern central part of the oblast.

The area of the district is 3,600 square kilometers (1,400 sq mi).

[2] Its administrative center is the rural locality (a settlement) of Rostovka.

[8] The population of Rostovka accounts for 5.8% of the district's total population.