Kargan (), or Karganskoye, is a lake in Kargatsky District, Novosibirsk Oblast, Russian Federation.
The lake is located to the north of Kargat, the district capital. Shibaki village is located near the southeastern shore.
Kargan lies in the Baraba Lowland, West Siberian Plain and belongs to the Kargat river basin. During floods the lake connects with river Kargat through the Obinek channel. The lake has a larger round eastern part with a diameter of approximately and a narrower and swampy projection stretching westwards for about . The shores are gently sloping and covered in reeds and bulrushes.
Lake Ubinskoye lies to the north, Bolshiye Toroki to the ENE, and Itkul to the southeast.