Karasuksky District (; , ) is an administrative and municipal district (raion), one of the thirty in Novosibirsk Oblast, Russia. It is located in the southwest of the oblast. The area of the district is . Its administrative center is the town of Karasuk. Population: 46,262 (2010 Census); The population of Karasuk accounts for 61.8% of the district's total population.
Rivers Baganyonok and Karasuk, as well as lakes Astrodym and Studyonoye, are located in the district. Lake Chagan straddles the KazakhstanâÂÂRussia border.