Zhanaarka, known as Atasu until 2020, is a settlement in Zhanaarka District, Ulytau Region, Kazakhstan. It is the administrative center of the district and the only populated center of the Atasu rural district (KATO code - 354430100). Population: 14,265 (2009 census results); 14,281 (1999 census results).

Zhanaarka is located 320 kilometers (200 mi) to the northeast of Zhezkazgan city, by the confluence of the Sarysu and Zhaman Sarysu rivers. Lake Koktinkoli lies 35 kilometers (22 mi) to the southeast of the town.