Aksuat (Kazakh: Ақсуат; Russian: Аксуат) is a brackish lake in Nauyrzym District, Kostanay Region, Kazakhstan.

[1] Aksuat is a steppe lake of the central sector of the Turgay Basin in Nauyrzym District, Kostanay Region.

It is a shallow and elongated lake system, stretching roughly from SSW to NNE and consisting of two main lakes, the Small Aksuat and the Big Aksuat which are connected by a 700 meters (2,300 ft) long channel.

It can support large concentrations of waterbirds such as the white-tailed lapwing, common goldeneye and squacco heron.

[5] Among the fish species found in the lake, perch, common roach and carp deserve mention.