Isilkulsky District (; , ) is an administrative and municipal district (raion), one of the thirty-two in Omsk Oblast, Russia. It is located in the southwest of the oblast. The area of the district is . Its administrative center is the town of Isilkul (which is not administratively a part of the district). Population: 18,942 (2010 Census);
Within the framework of administrative divisions, Isilkulsky District is one of the thirty-two in the oblast. The town of Isilkul serves as its administrative center, despite being incorporated separately as a town of oblast significanceâÂÂan administrative unit with the status equal to that of the districts.
As a municipal division, the district is incorporated as Isilkulsky Municipal District, with the town of oblast significance of Isilkul being incorporated within it as Isilkul Urban Settlement.