The Aby Lowland (Russian: Абыйская низменность; Yakut: Абый Намтала, romanized: Abıy Namtala) is a low alluvial plain located in the Sakha Republic, Far Eastern Federal District, Russia.

The area is flat and mostly marshy, the average height of the plain being between 30 meters (98 ft) and 94 meters (308 ft) above sea level.

The rivers are generally slow-flowing and meandering, connected by channels and with very boggy shores.

The Aby Lakes, mostly small and numbering over 15,000, are dotting the lowlands.

[4][1] In the winter the plains are frosty owing to stagnation of cold air.